Agree that you should install inline fuses on the lines leading from your disconnect switch taps so that sense has overcurrent protection. A more elegant solution might be a terminal block fuse holder:
Note that you only need to interrupt one of the two Sense power legs (the black one) to reset the unit. If I were you, I’d knock out a new hole in the bottom of your disconnect enclosure, run a short section of conduit down to a wet location switch box mounted under the disconnect, and install a normal 15A single pole switch in there.
You might also want to read this thread: