And fixed into rear position using tower bolt into floor at bottom middle. When you push the unit back, a door stopper slides into a hole in a wooden block on the top of the unit, this stops the cupboard moving from side to side when driving the van. The small door knob on the outside was originally for sliding the unit backwards and forwards, but now there is quite a weight of stuff inside it so I have to push the unit from the middle. I made the seat cushions out of a few layers of underlay(not very comfortable). Lin made a great job of the seat covers.