Thanks for all of the input! I got some great ideas from the information you all shared. I have completed my install and I am very happy with the results so far. The only thing that ended up presenting any sort of problem was creating a mounting bracket for my Elite 7. I am sure that someone makes exactly what I would have needed but since the Kayak Bass Fishing tournaments were just around the corner I did not have time to wait for the parts. Instead I ended up combining several different products and came up with a pretty good looking mount. (I will post better pictures of this soon)
Battery mounted in the rear hatch with foam supports
Power supply plug/sealed with marine epoxy
Male power supply plug
I used the Yak Attack Gear Track to mount it between the rail and mounting deck for easy accessibility. I also used Ram balls for easy adjustability and removal.
So far it has been nothing but an amazing addition to my PA 14. It has helped me pinpoint fish in awesome detail that I never could have seen before. It has also given me a much better understanding of the bottom contour, even in areas I already knew. Definitely worth it!