Rep Power: 0

I have been installing my Passport SRX and have finished up but need to connect it to a power soruce.

I brought the cables all in through the firewall under the dash on the passanger side, now where do I connect the wires to, for the 12V power source?

Does anyone have a picture of where I tap in to the power supply and a ground?

I have a 2003.

Thanks.