Ppm3 wiring

[HannaMan]

Hey everyone - can someone please check where the black / white wires go into the back of the ppm3. There are about 10 slots, and I'm curious which slots black and white go into. No electric ignition. They are held in by a small set screw. As is I believe they're wired incorrectly because the meter doesn't start up and it did prior to undoing the wires.

Thanks in advanced