That will certainly work for for you. They do make rubber boot terminal covers, don't usually see them on cars. I used them in several places in the airplane that I built. Aircraft Spruce and Specialties would be one source. If this had been my car, I would have mounted the coil and FBO module in the normal places, but that's just me, nothing wrong with your installation. Glad that you got it cleaned up and best of all it works for you!