This is just a short bit about what I did to make sure the GPS, LTE and other antennas remain connected to the tablet since I was not keeping the back of the tablet attached.
I had some lofty ideas but in the end the simplest one was chosen. It also was the one that did not involve any more soldering!
I decided to just cut out the pieces of the back cover that had an antenna embedded in them and glue those pieces onto the contacts on the tablet. These contacts are very small and would have been nearly impossible to solder or connect wire to using any other method.