I discovered that theres no way to get cables from the drivers side (where the hole was) to the passengers side (where radios would likely be mounted). So I've run the DC along the side of the transmission tunnel to under the drivers seat. Here I terminated the power with an 'AREC 50A' connector (see next pictures). I also piggybacked into the back of this some lighter-guage DC cable suitable for lower draws (VHF/UHF type stuff) and terminated this with an 'AREC' T-Connector. Both Connectors supplied by John ZL1PO (formerly ZL1UST) of Hamilton.