I made the test
1) Yes, it have power
2) the orangerx dont turn on but the jR rx turn on.
3) I have the cable that have black,red,white
4) no but I cut to male/female and made one male/male with caution.
5) The ones that said -+. I put the first cable (- + singnal) in the first three pins.
Note:
i changed the cable for a good one. Now i put the cable (FC -+ signal) in the RX, connect the battery and i can hear a beeps but no lights go on. I take out the csble from the RX and the lights in the FC turn on. This is wierd.