Korg Poly 61 Voice Board

Hey there, I have a Poly 61 I restoring and I need a new voice board. I found a KLM 47681 voice board for sale on ebay, but this is not the board that is currently in my model. The voice board i have is a KLM 508A. Does anybody know if I can swap the voice board with this KLM 47681? Any help would be appreciated!