Here is a series of photographs showing how I installed an on/off switch for the Starling Technologies Light & Sound Kits for the Pegasus War Of The Worlds Martian Machines. I wanted an internal on/off switch to power the self-contained models so there would be no battery wires from the base to spoil the scene.
If you decide to use clear 'stilts' like I did to suspend your ship(s), be sure to file down the INSIDE back edges of the three green bottom light inserts so they are recessed in the bottom shell. Taking off about 1/8 of an inch should be enough. This not only creates a nice slot for your legs to rest in (without gluing), it is barely noticible since they are on the underside of the ship. BTW, I used the clear Lexan rods that are used to open & close the shades on mini-blinds. They have a retangular shape with diffracts the green light from the bottom inserts nicely. They have them at Home Depot for three bucks or so. Depending on how high you want your ships to perch, one rod should be enough for each machine.
If any of this is unclear or you have questions, please do not hesitate to email me with your query and I may be able to help you out.