ESC problem

I am building my own drone. I bought some parts online and put them together. Then I got a problem. The ESC has 3 SIGNAL wires (ground, power and signal) but my flightcontroller board has only 2 inputs for (ground and signal) the ESC's. I still soldered the other wires to the board and tested it with betaflight motortest and with my controller but the motors don't rotate. The reciever works fine and I measured that there was power going through the ESC power input cables but there was no power on the ESC output cables. I hope you guys can help me.

Links for my parts:





motors and ESC's :


Picture of the drone:

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