Running wires for an aftermarket rearview camera to the radio

[rubeninfl]

I read that there was a post on here that showed how to run the wires for an aftermarket rearview camera to the back of an aftermarket radio....and also where to tap into the power. I can't seem to find that post though. Does anyone recall this?

 

[m4zda.man]

I don't think there is. I've asked the same question in this thread:
http://www.mazdas247.com/forum/show...termarket-Backup-Camera-with-Mazda-OEM-Screen
But haven't had an answer.