Ok, bit better description here:
The backup light switch wires are colored blue and green, if I recall correctly. For the column switch, it is the two wire connector that goes into the switch that is on the top of the base of the column -- The same switch where the starter's purple wires (one may be yellow) run through as well. Thats the park neutral switch that keeps the truck from cranking the engine while in gear.
On a standard, the purple wires or purple and yellow wire run up to a switch on the clutch, in an auto conversion, I've always just spliced those two wires together, and forgot about it after that. The blue and green wires are a bit longer, and run to a connector, on the other end of that connector is a length of wire that runs through the firewall, to another connector on the other side, then it has an extension that runs down to the switch on the top of the transmission.
Since it is just a matter of opening or closing a circuit, you can connect the wires in any order, if they are the same color, or the same colors if you want. Then when you put the tranny in reverse, your lights will come on as they should.