[snakebitx2]

I am in the process of installing the Fore return fuel system on my 2003 Mach 1 and need some help figuring out which wire from the stock fuel setup is the remote wire to the FC2. The instructions state, "the voltage signal should be delivered from the vehicle's original fuel pump power wire so that the fuel pumps will operate as intended by the vehicle OE."

The picture attached shows the 4 wires that went to the OEM fuel pump. I believe the two yellow wires attach together for the fuel level sender. I'm left with two solid black wires and a black wire with a red line. I'm not sure which black wire attaches to the fore hat or if it even matters. My guess is the power wire is the black/red and the last black wire isn't used. Can anyone confirm?

The other picture is my FPDM and figured this would be the ideal place to tap into for the signal wire. Does anybody know which wire should be used?