I would also suggest buying a trolling motor harness when buying wire unless you have some experience and a proper crimping tool to do it yourself. They usually charge about $5 depending on the type and size of lug but they are done with a proper crimping or mechanical connection in a shop environment instead of laying in the floor of the boat with a cheap crimp tool and break strands of wire and damaging others where corrosion is allowed to set in. They will also apply heat shrink at the termination for that charge. It adds up but I have found it to be worth the extra expense. I have a proper hydraulic crimp tool that is supposed to be universal but the lugs and terminations are not universal....they are designed for a specific crimp tool and work best when that tool is used. They will work with any tool....I have beat 'em flat with a hammer and a chisel and squoze them with a pair of 9" Kliens but a proper crimp tool makes a big difference. Properly applied heat shrink is equally important. For specified loads, battery cables and power feed cables I always pay for the factory assembly UNLESS I know I can buy the proper lug for the crimp tool I have access to.