MAD electrical upgrade modification?

You might search for "feed through"

http://www.cooperindustries.com/con...feed_throughterminalblocks/series_c7021_.html

https://www.google.com/search?num=2...ed=0CAkQ_AUoAg&q="feed through" stud terminal

One of these could be configured to go through the bulkhead. You of course need appropriate measures to prevent shorts, and get a "substantial" one for physical durability as well as electrical capacity.