Its the same contacts that Roland, Korg, KeyB use - and many others (but not Yamaha)

Regarding the cable to the top panel, before you fasten it down, unplug it and plug it back in a couple of times I doubt the problem will come back then.

If you have not opened the Audya before (but I think you have) then you will need a flexible screwdriver attachment to get to those two pesky screws at the front on the inside of the two side panels.