Hi RJ

I assume the wheel chair has to slide out of the cargo space of the vehicle then be lowered down to the ground, in a way somewhat similar to the way a forklift works. In my head I imagined the chair parking on a plate that has channels for the wheels to locate them. When lowered to the ground the chair would be driven on to the plate and locked in place probably by clamping the wheels in some way. Once locked on, the plate would rise then slide into the cargo space with sufficient room for the cargo door to be closed.

Regards
John