I have fashioned a “box,” actually tube [using 2" ABS pipe] for my AirZound Horn, speaker remote, speaker & strobe switches. 
Using a control “tube” like this reduces the items I have to place on the handle bars and simplifies mounting the devices on the trike. As I intend to mount it [on the boom, just in front of the water bottle bracket] , the devices will be at a function location. The wiring harness goes into the tube, connecting to the two switches [yet to be added in the drilled holes].
Ordered the lighting extension cables, indicated by violet in my Sunday 1/20 post.
As stated below, I’ve ordered the switches, but will not receive them until next week. I also have to add an end cap to the tube. It is water resistant. I intend to not seal the end caps so I have access for additions and maintenance.
