Recently I came up with a bit of a unique way of sorting out the sounder wiring for fish finder installs with a view to keep the wiring - especially the wire-to-wire connections high and dry at all times. We've started using it as our default method of installing sounders whenever we use the rear hatch for the battery position. A lot of customers wanting to DIY have been asking us about it lately, so we cobbled a bit of a guide together and posted on our website. Its a long article so I won't copy 'n paste here, but below are a few photos intimating what its all about:
Full article here: http://slhobie.com.au/info/articles/436-spring-loaded-sounder-wiring-install