Articles using the GX12-3 Pin Connector:

Spindle Chiller Alarm Wire

First remove the back cover, then remove your desired locations punch out

Remove the nut of the GX-12 Connector, and thread the connector from the outside with the nylon washer on the outside of the connector serving as an electrical barrier.

Thread the nut from the inside and tighten it down. Then route the wires into the slot. 

Pro tip: If routing multiple wires at the same time, group and label them meaningfully so you know what they are.