MMM internal BEC

I'am waiting for my MMM, suppose to be here next weak. I've always run my previous ESC with an external BEC, i've a Koolflight UBEC sitting here. I want to know if i can completly remove the internal BEC on the MMM (cut the wire inside of the case) or should i simply remove the red wire on the plug like i did with all of my others controller.
I know if i only remove the red wire, the internal BEC is always active, but not suply voltage to the Rx.

But can i completly disable it???????????