Power for front facing Camera?

I have a pioneer head unit, and will be adding a nakita front facing camera, but not sure where to tap in for the power… is there somewhere to gain the power from the back of the head unit?..or do I need to go the add a fuse route in the fuse box, & if so, which fuse would be the best one to tap into?

 

If remember correctly I got a RCA Jack to the HU. I added a switch which supplied power, just tapped off an existing switched aux fuse. Didn’t add a dedicated camera fuse. The camera only takes a small fractions of an amp.

 

I see what you did, that’s nice, unfortunately, it won’t work for me, I will be accessing the camera through the head unit itself without an extra switch, still confused on where I’m going to get the power