Need help installing shift light

[Fai]

I just brought the Razo RS13 shift-up indicator there is a wire that I will need to connect to the computer which says "Engine Revolution Signal" Do you guys know which wire to connect to? I have incluced an attachment of the instruction that the shift ligh includes saying where to connect the wire, but i dunno which one is correct, please take a look at the pic and tell me plz... i really need your help

(help)

 

[MazdaSpeedTurbo]

I just brought the Razo RS13 shift-up indicator there is a wire that I will need to connect to the computer which says "Engine Revolution Signal" Do you guys know which wire to connect to? I have incluced an attachment of the instruction that the shift ligh includes saying where to connect the wire, but i dunno which one is correct, please take a look at the pic and tell me plz... i really need your help

(help)

connect it to that one

 

[Fai]

connect it to that one

thz,is it the first 1??... what is the diagram#...