you have to splice into wires to install these systems. however due to the data modules, its much less risky now. on the current platform f150 there are 2 sets of can data that the modules reads. this pretty much controls everything after you flash the module to the truck. i believe theres a t harness available as well, but im not sure if it makes all the connections.
Youch, I definitely dont need one of these systems. I'm perfectly content with the ford pass app