We spent the day following the schematic diagram on my 1974 TR6; . We believe we did a pretty good job but we have a problem. On the schematic it shows that there is one yellow and green wire running into the interlock switch and one wire running out , yellow and purple. On the harness we are using we have two wires that align with the interlock switch both are yellow and green running in and two wires run out, both yellow and purple . We can use one set running in and out and this would agree with the schematic , what do we do with the other set ?