Installing a bill eprom reader chip in a VM 401/451 vending machine.?

I have a 2009 VM 401/451 Electrical Snack & Soda Vending Machine. I was sent an upgrade chip for the bill reader so its able to read the new $5 bills and cannot see where I can install it. The company we got the parts from has not got back to me with instructions on installing it and are have been no help regarding... show more I have a 2009 VM 401/451 Electrical Snack & Soda Vending Machine. I was sent an upgrade chip for the bill reader so its able to read the new $5 bills and cannot see where I can install it. The company we got the parts from has not got back to me with instructions on installing it and are have been no help regarding this upgrade. Its serial number is V401-A-0177 with no IO controller. Any help would be awesome!
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