
Hello Grazi
I think I can be at your assistance for this...
don't know the year of your car though, but I believe i should be the same...
so I guess you've already taken the whole cluster out, and find that there are three plugs plugged to the back of it...now I can tell you where the power is..
1. locate the BROWN PLUG, should be on the RIGHT
2. There are about 20 wires directed to this BROWN PLUG, find a SOLID
GREEN WIRE, it's toward the end of the 20 wires, this is your power
for the gauges
3. Splice this wire, and connect this wire to the RED WIRE provided by
your kit.
4. For the BLACK WIRE in your kit, make sure to find a good GROUND,
(i.e. bolts, screws, surface), it has to be connected to the chassis of
the car, don't use areas with paint.
5. Fire up your gauges! Hopefully it would be a very rewarding 15
minutes for you! (though it took me like 2 hours...since there was a
lot of experimenting going on...

)
so...best of luck to you, and enjoy your gauges!
God bless
Kevin=)
2001 blue Solara