Reverse up to the container you want to connect, press the Roll Off Deck button on the dash or on the left side on the outside of the truck. Go to the container you are trying to pick up and turn on its bottom connectors. If you are too far away get back in the truck and reverse some more.

Connect the container, then push the Roll Of Deck button again.

The Connectors won't pull the container up on the bed, what do I need to do?

Back up to a container, push the button in the dash or on the left side and the deck will tilt. and push the other button to release the container.

How does the container roll onto the bed of the truck?

might need to look at the all the trucks, some have no connections to panels and electricity. Also some labeling on the driver set to know what does what, other than that they are very good.