FIC VT-502 Manual page 37

Installation Procedures
This 12-pin block connector is used for connecting to the standard 5V
power supply. In the picture below, notice that, in most cases, there are two
marks "P8" and "P9" on the surface of the connector. You have to insert the
"P8"plug into the "P8" section of the connector, and so forth for "P9". Two
black wires must be in the middle.
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