There should be a "U" shaped bracket (on the RFM) with two holes in it to accept the upper link pin. For transport (raised), you made have to put the upper link pin through the bracket hole closest to the pivot pin (of the bracket), then shorten your link until it's pretty tight (don't use a wrench..just your hand).
This may not be the hole you need to use during mowing operations, but it only takes a minute or so to adjust the upper link to switch holes. I use the (bracket) hole that gives me the most "swing" when I mow. This is because I have enough slopes and crest the tops of those slopes often enough to require as much free up/down movement as I can get.
Transport, especially over distances, is another matter. You don't want that RFM swinging too much when you're transporting more then across your drive, for example.
As far as the lateral sway, you should have links or turnbuckles on your lower links to adjust this. If you've a manual with your tractor, this will be explained more clearly in the manual. If you've not read the manual, read it. If you don't have a manual, I suggest you try to get one for your machine.
Since your tractor is a "grey market", manuals may not be readily available. If this is the case, adjust your turnbuckles (or links) until they're pretty snug in the raised position. They'll loosen a bit when you lower your mower, but not enough to cause you any problems.
You really don't want that mower moving about too much as it is a fair amount of weight back there.
