I bet that if you take those four screws out of the bottom of the faucet and remove the bottom plate, you will find O rings / seals that are suppose to seal against the tubing. No glue.
For the rare occasions that you would need the second motor, have you considered a kicker motor? I have a 20hp kicker on my boat that isn't a speed demon but will get me back to the dock.
Sorry if you misunderstood the post. I do "T" splices on a regular basis as shown in the video - one wire on one side and two on the other. The wires are twisted together, soldered, then covered with a sealed heat shrink. You don't have to make the splice look like a "T", just have the three...
The bunks are better located under the stringers and/or close to the chines. I bought a Shoreland'r trailer as well and added additional bunks such that the hull was supported under the stringers and the other set of bunks were located at the outside edges of the hull just inside of the chines...