I see a couple 15-pin HD connectors, "XCVR" and "AMP". I have a pretty well stuffed plug on the K3 ACC socket now (RTTY interface / KRC2 / PR6 / KPA500). Does the K3 to KPA500 cable simply go to the KAT500, then a jumper from the KAT to the KPA ?? THX! 73, Bill N2BC