I have a real simple setup with an inexpensive wiring "harness" made from auto store parts. Just a couple of connectors and some terminals.
The terminals fit the battery perfectly. Two connectors so I can add lights or run my bait pump if I want, although I run my bait pump off of a different 6v battery.
Other end is attached with a fuse to my FF wiring. The connections are soldered and heat shrink tubed.
I use dielectric grease on the connectors and after about 1 1/2 years of use there is no sign of corrosion and no voltage loss at the FF.
Batteries are strapped to a foam block and strapped inside the yak between scupper posts.
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Hobie PA 14 ¸.·´¯`·.´¯`·.¸¸.·´¯`·.¸><(((º>
Jackson Kraken ¸.·´¯`·.¸.·´¯`·.´¯`·.¸¸.·´¯`·.¸><(((º>
Malibu X-Factor ¸.·´¯`·.´¯`·.¸¸.·´¯`·.¸><(((º>
Malibu Stealth-12 ¸.·´¯`·.´¯`·.¸¸.·´¯`·.¸><(((º>
Its not a spelling B its a fishing B
~yakjoe