On a 2007, I am not sure how many outlets are in your rig. My 2012 23B, which is the big cousin. Has an outlet in the rear bunk area, bathroom, under the dinette, at the TV area, and one outside. There is one behind the frig too.
I would start off with contacting Jayco with your vin number and ask for the 120 v AC and the 12 V DC power schematics.
The hardest part is determining where how to route the wires.
12v might be easier to tap into and install an aux outlet. I was able to buy a 12v cord for my cpap, for about $30.