Tell me a wire-to-wire connector that is soldered, not crimped
I resisted crimp technology for many years, preferring solder because it was more &quot;professional&quot;, until I saw good evidence of the superior reliability of crimped connections.
Nevertheless, if you have a strong preference for soldering, I suggest you search using the keyword &quot;solder seal&quot;.  You'll find a huge number of connectors available. This image is just from one example product example

Most of these are &quot;butt&quot; connectors designed to connect two wires coming from opposite directions. If you need to add more wires to the connectors, just use a larger size that can accommodate 2, 3 or 4 wires in the connector barrel. If you want all the wires to come in from the same direction, just leave the other end of the barrel empty or cut it off.
Edit: you've clarified now that you want pluggable connectors, not permanent splice connectors, so I tend to agree with the other responders.