Here is how I did it:
Reciever has 4 wires...
Red wire to circuit board (+)
Black and unshielded wire to PWM Black.
White to PWM White.
Green (ignore).
PWM wire to Digital Input...
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Seems like I need to hook up an external ground somewhere to power the sensor, but where does that go?
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I'm using the ground pin found on the digital input, works fine for me...
One thing I know is that you need the ground wire (from the receiver) connected to the ground on the digital input port. Because while the reciever is recieving a signal from the source there is a connection between the ground and the white wire, and the controller detects that connection through the digital input.