Can't answer for the OP (obviously<g>) but I'm betting that, yes, he did "run hoses from the rear remotes".
Say that because those pics could pass for my setup. Looks almost exactly the same and I did "run the hoses....".
Piece of cake install.
Order the premade hoses (sorry, I don't remember the length I ordered). Use a garden hose or chunk of rope...run it down the path you want to use to get from rear remotes to front of the loader arms. Path is pretty obvious once you get under and look.
Go to Tractor Supply (or equal) and pick up a quick disconnect mounting bracket for the front end termination.
Remember to leave yourself enough "slack" to make comfortable loops at the back end and find a convenient place to bolt the QD bracket at the front.
The one "issue" that I haven't addressed yet (but will) is that the control levers for the rear remotes (if yours are the same as mine) are just too short to allow for precise control of the grapple jaws. My "fix" will be to thread the end of the lever and add on a coupler and length of thread stock to increase the length. That will kill two birds....the added length will give better leverage and allow for finer adjustments, and, it will reduce the "brain drain" of me having to try and remember which lever is the one I want <g>. At this age, that matters!!!
All that said, I can honestly say that you made one of the best decisions you've ever made when you got your wife that present...<g> I know I did.
Actually, of the implements I've added to my Cat so far, there isn't one I have even the slightest bit of "buyers remorse" over.
Boxblade (use it constantly and the absolute best counterweight all the rest of the time)
Grapple (awesome)
Forks (can't live without them)
Ratchet Rake (takes some getting used to, to find the proper angles, but once you do, it too, "rocks"
Toothbar (without it your bucket is pretty close to useless in anything other than a sandbox....with it you can actually "dig". On top of that, it reinforces the bucket.
TNT....only have the "top" part so far but the "tilt" part is coming soon. If you use a boxblade (or blade, or rake, or...) you can't believe how much better life is with the "top" cylinder.....based on my experience with just that part of TnT I have to believe that adding the "tilt" can only be one step closer to heaven.
Post Hole Digger....bought mine used because I just couldn't justify buying new for the limited number of holes I was contemplating for the garden fence. Popped in the 16 holes/posts in 2 hours - would have been at least an hour/hole by hand in the "concrete" clay we have here. That went so well I went looking for more places to put posts - decided to build a compost bin - 6 more holes - YES!!! Anyway, long story short, way I figure it the PHD has already paid for itself and it's only lived here for a month or so.
Subsoiler - basically a "hook" that fits on the 3 point hitch. I don't use it the way it was designed but do use it for almost everything else from pulling stumps to laying underground pipe or wire.
3 point quick connect - doesn't work for all attachments, but for those that it does it's a real time/labor saver. As you have probably guessed, I do a fair amount of attachment switching and both the 3 point and the front bucket BC "quik-tach" or whatever they call it, have been worth every penny.
I wouldn't own a tractor without either one.