Batboard

In my inventory I have RTK 4057A and RTK 4058A cables. These are terminated in the Micor and later style male metering plugs and at the other end of the cable have a modular telephone style plug. Can't seem to find what they go with. Anyone familiar with these?

Geoff
WB6NVH
Monterey CA

IIRC R100 repeater
There is also a reference to the HT600 RIB interface...dunno about that