I am pretty sure this is the correct version harness and the pin-outs! LOL 🙂 Check first! This harness I am using on a Hamilton ACW5 credit card computer.
5 and 8 power serial side –> opposed sides 1 and 6 on rj12 side
48-3112 HARNESS, GL-ACW HANDHELD PRT $ 33.22
48-2111A CABLE, AUDITPRO HANDHELD $ 42.13
48-3150 HARNESS,TICKET MUX TO HANDHELD $ 33.26
100-0136 COMPLETE HANDHELD KIT $ 437.00