Everything is controlled at the business end by relays which mimic switches. Note, you can turn the lamps on and off with switches using the lamp control port on the Lhires. There is a wiring diagram in the ‘add on kit’ documentation I believe (back in teh day when it was an add on…). You just have to switch in 12V for the required lamp.
I think Shelyak’s gadget does the same thing.
I have used Prism’s automated method for imaging (as its handy to do filter changes, refocus etc on the fly) but I just use the camera sequnce panel for spectroscopy.