If you mean a switch to power off all the 5v stuff yes I did this with their switch. I put it between the bec and tether interface boards positive rail. So basically only the esc’s have power, thought about a crydon 100amp SSR as I use them to control heaters in my customer heated 3d printer enclosure but not sure if the rov will push past 100amps even if just for a moment.
edit:
don’t be a goof like me put your switch on the outside holes so its easy to turn, my silly self put it on the middle holes on the 18 hole plate and its hard to turn.