So I'm playing on 1.12.2 of this mod and I can't seem to hitch any of the vehicles together. I've clicked literally everywhere on every vehicle with a hitch and all that happens is I end up either :

a) accessing the inventory
b) getting on the vehicle
c) picking up the vehicle

I know this is an issue that has been discussed before, and I tried clicking towards the middle of the vehicles with no change in result. I even reset my keybinds to default hoping to fix the problem. Nope. Even spawned in vehicles have the same result. Not sure what I'm doing wrong and what I need to provide to see if its a bug or me being dumb. I appreciate any advice and thank you for your time.

Edit : using version 0.43.5, and have also noticed that the Storage vehicle no longer has an inventory.

Only trailers can be hitched to vehicles with a tow bar