It appears to be a hookup point for more speakers but I don't know if it is for some sort of Leslie or rotary speaker or for the presence projectors I want to add. This appears to have been added later as its DOP is November 2003. The organ already has a UNIREL board for hooking up the antiphonal speakers, so what is this for? Someone please advise. I can send a pic, but do not know how to add it to the post. Thanks file:///Volumes/Untitled/DCIM/101MSDCF/DSC01337.JPG
Allen