I've got an ipk2 system that has a paging and doorphone adapter model # NEC pgd2-u10. Currently one of the rca output jacks feeds one amp that goes to some pa speakers. I need to enable the 2nd jack to do exactly the same thing as I have a new amp for a different part of the building.

I opened the case and saw 2 pr of jumpers. 1 pr had them connected up, the other pair didnt. Is this as simple as connecting the other jumper? Thanks -