Looks good.... when I did the "Big 3" upgrade i used 2/0 tinned copper shielded marine grade cable and soldered the terminals on and used the marine grade heat shrink that has adhesive inside.
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The bigger cable barely fits through the RVC sensor.
Anyway... lots of debate on crimping VS soldering. Personally I prefer soldering although crimping is much faster and easier.
The most important part, IMO, no matter which route you take is heat shrinking the ends, like you did, to keep the moisture from getting in and corroding things.
Sorry to hijack your thread.... carry on.
you juts did one negative wire through the sensor correct? or you split past the sensor?