Do you have the high score adjustment card in your backbox ?
One can be found here: http://www.pinballrebel.com/pinball/cards/
examples are given on the card .... "for a desired score of 115,000 plug blue wire into the 5,000 socket"
(the blue wire for a score range of 110,000 to 120,000)
unused plugs in the holes of the wood backbox interior