I didn't attach air hoses, but I have run electrical wiring between coaches that might provide an idea.
Coupled: http://gold.mylargescale.com/stanman/Coupled.jpg
Uncoupled: http://gold.mylargescale.com/stanman/Uncoupled.jpg
Coupled: http://gold.mylargescale.com/stanman/Coupled.jpg
Uncoupled: http://gold.mylargescale.com/stanman/Uncoupled.jpg