Hi, i own a monkey vending machine, it does have indicate on the front it can take 3x coins for a price but i can only make it take one to pulse to give prices. There are no dip switches on the board and only micro switch on the coin mech.. But in the board i have founf a resistor on a coin select.. any idea why that is and does it do something?

Any help very much appriciated..

Please ignore red arrow on the pic
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