I haven't operated a BX but if it's like my b6100 and b7100 where you can turn around and reach the top link from the seat, leaving the 3pt 'stabilizers' loose makes it real easy to hook a 3pt trailer ball up to a trailer without having to back up 100% perfectly to it, because you can just reach back and shift the whole 3pt side to side with your hand while you pull the lever to slide the ball up into the tongue. Downside of leaving it loose is it 'drives' loosey goosey too but hopefully if you're towing with a BX you ain't going too fast!
It's also possible to rig chains so that the 3pt is loose side to side when lowered, but tight and centered once you lift it.
Honestly, i'd pay money to take a class on 'rigging tricks' with chains/straps/ropes etc. Watching somebody tuck up a bunch of loose strap in a clever way, or tie a cool knot, just interests the heck out of me. I've never worked in 'hauling' so i just come across the stuff slowly, but i know a lot of truckers and loadmasters and sailors and various other people just have all this stuff kicking around in their brain and i wish i could flip a switch and get it all.