kill switch installation

I was wondering if anyone on here has thought about or have installed a killswitch onto their bronco sport. I had my eyes on this plug and play version however after contacting the company, realized its incompatible since “Ford has decided to go with soldered-in Starter and Fuel Pump relays, so our system unfortunately will not work with them”. Since the fuse box doesn’t have any relays at all, I did find the starter relay…