Kick down switch wiring.

[sideshow]

the staggered shift pattern
does it have a "d" and a "3" on it
and u flick the lever left or right to go from 3 and d
if u have this then u dont use an overdrive switch
so have u wired up the original shifter

 

[scuba_diver]

Yes, that's mine.
Yes, it's all original. That saves me having to find a way to route the wires then.
Thanyou to all for taking the time to respond, very much appreciated. Now, if I can just work out how to fit a transmission brake and finish bolting everything up I'll be sorted.