Hooking up 2 BEC without going thru RX

[rcs2022]

Thanks a lot for your reply BrianG, just let me comprehend this;

The black wire of the BEC you are referring to is the incomming to the BEC or the outgoing.
If it were the incoming i can just hookup my BEC to battery 1.

or should i take a black wire lead from the BEC out (-) to the Battery (-)