I worked on my son’s boat. We mounted the motor to the Jack plate and connected the wiring temporarily just to be able to raise the motor from the floor. My sons went to trim it up………nothing. I jumped it out to get it up and we put things up. I looked at the trim switch and found some really bad wiring. Scotch locks and a wire nut, I wish people would just stay away from wiring sometimes! I cut the **** out and cleaned it up. Soldering Vs Crimping has been discussed ad nauseam, I prefer soldering on a boat. I soldered and shrink wrapped the wires and then secured them. Last picture is of his boat and my work area.