Needing information on 69 key in, lights on buzzer

They all look to plug in with the same plug. but your right the pin out may be different. Was wondering if they are interchangable plug n play. Dont care about originality, just operation. Will have to see if theres any 69 C bodys locally in my junky I may be able to get it from. A lot of times part numbers are superceded to the next latest and greatest one but will work in older applications.