speedo sensor location

[Mint-VTR]

hello guys, basically in order to have the mph clock working in my ax i need to run a wire from pin 3 on the speedo sensor to my clocks (106 clocks)
am i right in thinking the speedo sensor in on the gearbox? if so where abouts, getting confused!

cheers guys

[H-Unwin]

on a saxo its on the offside output of the diff.

[Yates]

just under starter motor