[SVAuspicious]

I checked out West Marine but could not find these. I believe the wires are greatly different in size. Do i triple over the exposed wire portion of it before inserting to be crimped?

West Marine superstores will have them but smaller stores will only stock them if a manager adds them in. They can certainly order them for you.

Here is a start: Ancor, Reducing Butt Connectors

I haven't found any with adhesive shrink covers so you will want adhesive-lined shrink tubing to cover the crimp, ESPECIALLY in the bilge.

 

[SVAuspicious]

I sell step down butt connectors as large as 8 to 10/12 gauge. They all have heat shrink and are from Vertex.

These? Vertex Marine | Heat Shrink Step Down Butt Splice - Marine Electrical Cool. Thank you. Are they adhesive lined or just shrink?

 

[SVAuspicious]

Adhesive.
All heat shrink on a boat should be adhesive lined and that is all we sell.

I agree with you. That's why I asked. *grin*