I was thinking the same thing as Joe. I tried to strip the little red and white wires in that set, and they were too small for the 22 gauge hole. So they must be pretty small.
I was looking at these things on All Electronics. I need to go measure the distance between the pins I guess. Some of these use 18 gauge wire and some use 22 gauge.
http://www.allelectronics.com/index....tem&id=CON-232
http://www.allelectronics.com/index....em&id=CON-230P
http://www.allelectronics.com/index....tem&id=CON-242
Maybe something like that will get the job done? I'm sure not a lot of people put much thought into the signal light yet, but I wanted mess with it, and found I didn't know how to make the wiring connections...