Some previous owner of my RFM hacked together a cable in my machine. I believe one of the wires has come unsoldered but I don't know which pin to solder to (or why the owner would have hacked this cable together in the first place). See pics attached. The dark grey cable is soldered to pins on the beige cable, and the other end of the dark grey cable is a computer serial cable plug. Any ideas or suggestions would be appreciated, thanks!
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