'69 reverse light switch compatibility??

[alteredpilot]

i'm under a '69 charger with no reverse lights. They work if you jump the harness, but there is no continuity in the switch. Its a practically new switch (which doesn't mean much these days). I seem to recall reading somewhere that the rooster comb is different between the '68 and earlier. I don't know if the transmission is original to the car. Just wanted to get some clarification on the comb before i take the switch out to test it.

thanks for your input.