How do I put a vehicle on the bed of the H-Series DOT flatbed? (Cabster?)

When I try to put a damaged car on the bed, it usually resets the damage and turns it the way it was when it spawned, when I hit O to "Open cargo doors" (Assuming it lowers the bed so cars can get on?) It does nothing. Any ways to put the car on the bed?

 

You could hit F8 and 'teleport' the car on the flatbed, but other than that, I don't know if the H-Series flatbed even rolls back to get the car. So hitting F8 is probably your best option.

 

isn't it F7? Or does F8 do the same?

 

F8 is used to get out of the vehicle camera F7 is used to place the vehicle

 

No, it's F8!