I am on my second Trailer. What I have used are the type of end connector where you put a wire at coming from opposite directions into a hole and it has a pin that perces the wire and make the connection or using open end metal tabs that are crimped onto an open wire. Many a time the crimp did not hold and had to do many redues.
What are the new ways to make 12 volt DC wires connect to a light or switch or continue a wire??
Ron Dickey Cross Bow.