The pedalboard is removable. The pedalboard key sit on backfalls maintained in high position by springs to avoid that the mechanics falls when removing the pedalboard.
The pivot point for the backfalls
The front of the backfalls
The springs comb
the pedal coupler roller board
Wooden pins for the pedal coupler
Under the windchest, we can see the second backfalls connected to a wire that pulls down the front of the pallet.
The pedals for the couplers