The uninsulated butt connectors are great for connecting single wires or even a few smaller wires together in a smaller space. If you want to step up another level, look into open barrel connectors. They serve a slightly different purpose and require a little more hand coordination, but it is a single crimp. You can add several different sized wires and change the direction each wire is facing. It's really good to run a longer large single conductor and then branch off to smaller conductors in the harness or near the end of the run.

https://www.prowireusa.com/p-3226-op...ose-piece.html
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