KPT-7C RF Module connector
Base of the KPT-7C RF-Module case and connector. The old module won't be used again so the connector can be removed and old module used for the modification.
For this 2.4Ghz conversion only three of the six wires will be needed. Red (+V), Black (Ground), and Yellow (signal/PPM). The orange/black appears to be part of the original buddy-box circuit, white is to the antenna, and drives the RF-strength meter.
1980kraftseries eightyrckpt7c7cradio controltransmitterrfdeckmodule