Re: Custom Electronic Design
Post specific questions here and search sailnet using google by adding "site:sailnet.com" at the end of the search. You can find lots of posts about splicing two wires. Mostly it comes down to using a small terminal strip or just jamming two wires in a butt splice (that's what I did for the Nav lights). They make specific butt splices for 2:1 connections but you don't necessarily need it.
Otherwise I recommend the very good books by Nigel Calder.