If I did not have anything to secure a tractor I would probably buy 4 ratchet straps with the chain ends, 1 for each corner of the tractor. If you have a loader it if supposed to be tied down and anything on the 3PH needs to be tied down.
Here is and example of the strap like I was talking about. I am not sure if the chain on these is long enough to use to tie your tractor down.
2" Chain Extension Ratchet Straps | 2" Chain Lead Tie Down Straps
You don't ever want to have a strap going over a sharp edge because it will wear through so the chain end makes things nice.
If you start a new thread you will probably get more replies.