CORRECT CONNECTION FOR CHECKING LED POLARITY FOR 67 BARRACUDA INSTRUMENT CLUSTER

Yup!
I'm lazy, and not good at deciphering electrical diagrams.

*But I am rehabbing the instrument cluster, gauge faces, and lights while I am installing a new Dash Bezel.
Below is a picture of the back of my instrument cluster.
TO BE SURE LED POLARITY IS CORRECT....WHERE WOULD I CONNECT THE POS and NEG WIRES TO on the back of this cluster?

Back of instrument cluster.jpg