1994 Nissan Sentra dog ate the electrical system!

You can do this yourself. I take that the dog chewed the wire cluster, everything broken, but you have both ends. All you need is just to solder/crimp all the wires back together. All wires under the floorboard are color-coded. Get yourself some wires of similar gauge, I think 16 gauge, and find one wire at a time.

Here is another suggestion. Go to a wrecking yard, find a Sentra, 93-94 model year with same body style (2 door or 4 door), go towards the area where the dog chewed, cut the wire harness that was chewed, and all you have to do now, is solder/crimp matching color to color.