They are for you "match" game settings to earn credits. Do you have the schematics / manual ? There should be a card in the head with the settings. You plug the wires into the corresponding Jones plug.
looks to me like the 'High score replay' plugs, for setting up the high scores for which credits are awarded. As Nino says there should be a card in the headbox showing the score settings. Not sure if the settings are in the manual, i dont recall ever seeing them in a manual but i could be wrong 
Maybe another member with a Card Whiz could photograph or scan their setting card for you?.
I'll be working on a Card Whiz soon, which im pretty sure has the card still in the headbox, if no one else can help i can scan or get a pic if need be 
Stupid me
Just rebuilt a match unit and the High score wiring / jones plug is nearby, so I confused the two. You are right mitch. It is for the first and second high score replay adjustment.
