HELP - OMEX shift light - Tachometer wires?

[Track-car-doorcards]

Help, I have blown up my last engine so I have got one of these to warn me about shifting, having issues finding the supply wire to the tachometer on my Clio 172 sport, anybody got any experience in wiring this up? The right wire in the dash for the blue wire? Black is earth and red is 12V after ignition which I have sorted.
Cheers Simon

 

[bloke]

am sure you have to wire to coilpack feed and then set it to two cylinder? could be wrong as not done one for a good while.