This issue is often over-hyped and misunderstood. It is a really important issue when you have really long runs of wire, real small wires, or a large current flowing. But that is not your situation.
Think of it this way - 100 watts of power at 14VDC is about 7 amps. Number 10 copper wire has a resistance about 1 ohm per thousand feet, so if you had 1000 feet of wire, you would lose about 50 watts. But in 20 feet of wire, you would lose less than a watt.
Check my numbers, folks, but I think you are OK on the front shell.
Bill
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