To the left, I'm pulling two drops off the bus -- one on each side of the splice. The drops are 18 guage, as they're only running about 1 foot.

This splice was the last time I used heat shrink connectors.
My new Ancor Double Crimp Ratcheting Crimper not only crimps the connector but shapes the insulating cover to grip the wire, which wrecks the heat-shrink types. I've switched to ordinary connectors and cover them with separate heat-shrink.
This will also save bucks, since I seem to always cover everything
with separate heat shrink anyway!

After crimping and sealing, I take a small tie-wrap and clasp the cables together to reduce stress on the crimped splice.

Note that Ground is both BLACK AND YELLOW. I'm not going to throw out a perfectly good 100 foot reel of tinned wire just because ABYC standards have decreed that Ground is henceforth Yellow.

BTW, the easiest way I've found to remove the outer sheath on wire is to take a utility knife with just a teeny bit of edge exposed, and trace down the side of the cable between the conductors.

Anyway, I then take the splice
and cover it with adhesive
lined heat shrink.
The splice is well supported
and waterproof.

ABYC standards require wiring to be fastened to the boat
every 18 inches.