Snack Attack Vending LLC is offering a Mars MEI AP 110 Series Harness for VFM1 or 3 & VN2501 bill validators 110v. This harness has a (9) pin white power connection & (18) pin black pulse credit connection at one end. The opposite end has a (2) pin white power supply connection and a (14) pin white connection to the control board. If you are upgrading your bill validator to a Mars MEI validator. Then, this harness is a must have. This is a brand new harness from factory.