hello I bought this item as a battery eluminator for my receiver, I bought this one

http://www.dimensionengineering.com/parkbec.htm

Now looking at it, it only has one plug to a ESC, but I have 2 electronize ESCs.

Does that mean I need 2 BECs (one for each ESC) or do I join the wires, or does it not even need conneting to the ESC?

My receivers not here yet but the rest of the robot wiring is done now so I want to get ready for when it comes tomorrow hopefully