As much as I want to solder every joint and claim to be a master at wiring, I am perfectly okay using a melt on butt connection, almost everywhere. On my plow and sander and anything that gets disconnected regularly, I will use a Weatherpack or Deutch connector. I try and buy the solder melt connectors with the heat shrink but have a few more hundred of regular crimp connectors, that I use heat shrink on, before I die.
I keep records on my repairs and if I have a problem, I usually know where to look.
I also use Dialectric grease on most connectors, heck, I just used a Scotchlock last weekend.
Go ahead, get the fire ready.
I was doing lighting on trailers 35 years ago, with just crimp connections and no heat shrink.
That lasted until the trailers went into someone’s back field.
Only took care of 45 trailers.