With this mod, you can mount all vehicles/attachments on any low-frame platform. So they'll never slip out of the trailer again.
- Anti-rollback stops are displayed when you have secured the car/gun with wheels
- The number and total mass of fixed vehicles are displayed in the F1 menu

Default controls:
KEY_ctrl KEY_s - fasten/unfasten cars

Most low-level programs on Modhub work with this, and some don't. (because the correct "dynamicMountAttacherTrigger" is not defined for them)