Which 2 outlets are free in the CP Pro receiver? Is it 5 & 6? Trouble is, I was replacing my fried 3 in 1 when the phone rang. Having a senior moment. I couldn't remember where the bottom most connector was plugged in (I removed it to get it out of the way of the 3 in 1 wires) Is it in the (ascending order) ch5, ch6, or the B channel plug?

Even a good pic of the assembled receiver will do...