3d printing / Cannot figure out how to connect the extruder with the 4p 2.0 cable

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Hello everyone!

I’m very new into 3d printing and I’m also unlike most people here not a real techie, so sorry if my question is too dumb!

Anyway I’ve attached the hot end (nozzle) to the arm but I can not figure out how to connect the extruder (the part with the motor that pushes the filament forward is extruder, right?) with the 4p 2.0 cable to a power source. None of the 4pin slots on the arm seems to be compatible.

20170622_143208

Thanks in advance for the hint!

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The cord plugs into an adaptor board which then plugs in to the wide port on the back of the uArm base.

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Having said this above, every time I plug the servo in, my uArm stops working until i unplug it again. Anyone else with this issue?