Pixhawk cube connection to a spektrum receiver (not to a satellite)

I’m using a spektrum satellite connected to the SPKT port of the pixhawk 2 but I would like to connect the ar12120 spektrum receiver to pixhawk 2 because I want to use the four satellites that the receiver can bind. I think that its possible to connect the SRXL port of the receiver to the SPKT port of the pixhawk (only signal and ground, without using power) but I would like to confirm it. it’s possible? Does anyone have experience?

Thanks in advance