Electrical solderless or soldered connectors
Here's some posts about crimping open barrel terminals (aka F-type, or W style)
Checking crimps
Lets Talk Open Barrel Crimpers - Reviews and Discussion
A bit of Wiring 101
Do soldered joints have a place? Of course.
Should terminal connections be soldered? In most cases no - for the reasons listed - but it depends on the terminals and the wire support.
A lot of wires are not well supported. That's a big problem on cars that have been owrked on a lot. The cables may have been supported at one time but now are not. Strain relief is important. Shrink wrap can help but its not a substitute, more of a belt and suspenders IMO.
There's a post about splicing per Dodge instructions (1990s?) using open barrel splice connector, soldering, and heat shrink. But on those there is no crimp for the insulation.