The Y connector for e/o cord connects two e/o cord cables (underwater lamp or heated vest) to a power source.

Y connection for e/o cord Cables are always used when you want to connect two light sources to one power source.

This makes sense for a SeaY battery tank with a cable and two video lamps. Another variant is to connect an underwater battery tank with a cable and a light source (HID or LED) and a suit bushing / heated vest.

The Y connector or Y adapter can be mounted underwater.