I ran my cc bec wire along side my power wires on the mm. Then soldered both the mm power wires and cc bec wires to the battery plug together. It's a bit hard to get the shrink tubing to fit over everything, but it does with a little work. I then ziptied the cc bec and mm power wires together so they don't try to come seperated and yank out at the end. Also, there are places that sell pre made dean's Y adapters to wire in 2 batteries in either series or parallel, whichever you prefer. That is if you are using dean's plugs, not sure since you mentioned bullets. Or you could look at one and make your own harness. And as already mentioned, make sure you pull the little red wire comin off your mm that goes to the rx out of the wire harness and you should be set.