Please explain wiring on garage door

Why not press the switch at the end stop with a stick then!

How on earth would anyone know what to suggest without make, model and age of the unit?

I cannot comment on your door as you haven't given any information re make, model etc. However my door also works on a two wire sitch, press and release - it opens, press again while it's moving and it stops where it is, press again and it closes. I certainly wouldn't play with the spare wires without more info, you 'might' end up with a costly repair.

Peter

Fair question of course - but I really can't see any info on any of the equipment that identifies it! One of those little irritations in life I guess I'll have to live with.

I would investigate the runners and track, and then possibly look where the door ends up and seek a switch. Once found you could run a parallel switch to enable a convenient point of contact on the wall or whatever.

You may find the contacts are in the drive unit. When my door is fully opened and stops moving the motor doesn't stop until a threaded cam moves along a shaft and closes a contact. This also acts as the safety cut out, i.e. physically obstruct the door and the drive stops in exactly that same way as when it is fully opened/closed. See my posting earlier today.

Peter