Nuetral switch help

Ok tipical column to floor shift console swap 68 Dart. The shifter has the nuetral switch on it and i have the three prong NSS. I know that the middle prong goes to the starter relay and the other two are back up lights. I have gotten myself confused, i have read a dozen peoples explanation for the same thing told diffrently. I have what I think is a console harness, wire in picture on the left. The wire on the right was pluged into it but i think was home made. I'm assuming that this plugs into the switch on the shifter. Where does the other end plug into?. I need a wire by wire discription from NNS to relay, console to where and how does this all get its power. You guessed it I Know little about auto electric.
could reallty use some help.