Here is a
LINK to a variety of Scotch Brand taps.
I know many, many people don't trust them but if they are so bad, why does 3M sell billions of them every year. And contrary to your belief, ScotchLock connectors are very good. The City of Los Angeles has over 4500 intersections that have traffic signals. The wires are run through underground conduits and the conduits end in surface grade pullboxes. If you lift the loose fitting concrete lids you will find that there are hundreds of thousands of twist on Scotchlocks splicing those wires together. While TS wiring is solid copper and vehicle wiring is generally stranded, they do work extremely well with solid wire.
There are several types of Scotch brand "T" taps and two wire or trailer taps that also sell in the billions every year. Some say that the metal tap you push over the wire will cut the strands, if you use the correct size, there will be little or no damage to the strands.
If you absolutely must have weather resistant connections, there are Scotch connectors for that too. There is no
SIMPLE,
EASY way of making 100 percent liquid tite connections.
Don't get too worried about the connections and keep them simple.