The Universal Suit Adaptor is a perfect solution for using a heating vest underneath your dry suit. The installation of this adaptor requires a hole through your suit, but can be installed anywhere on the suit. It also keeps everything low profile vs. the inlet valve adaptor which adds quite a bit of height to the valve.

The wiring and connectors (I/O and Fischer) are both waterproof. The connecting cord is long enough to reach your CUDA's power outlet and short enough so that it will not be a hazard on a dive.