I am planning on having a total of twelve rockers divided into two gangs of six per row of which two will be a double port 3.2 amp USB power port with red backlighting giving me (4) total powered USB ports for charging phones, GoPro, GPS, etc. the remaining 10 switches will perform the various electrical functions all through a Cooper Bussman power distribution module, this module has an 6 gauge main Positive power line & 8 gauge Negative grounding line both to the secondary Oddessey 925 Battery, then there is (5) output wires with 15 amp fuses without relays for running the minor stuff like pod lights, horn, etc. There is (5) 35 amp relay lines with 30 amp fuses for each line / relay with a 14 gauge wire to go to the switched power to close the relay and (5) 10 gauge wires coming out of the fused relay to power bigger accessories, Light bars, Stereo, etc.
Here is the power distribution module as received, all prewired and includes all necessary items like heat shrink and butt connectors, etc.
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Here is a detail of the top with cover off and underneath detail:
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Looking under the hood for a place to mount this PDM there was not a location I liked with the metal standoff attached to the Bussman PDM so I removed the standoff then you have the prewired bundle coming from underneath so that negates a flush mount. Then the light went off that the large black cover that covers the air pre-cleaner and intake tube could house this PDM in a recessed cutout in a very tidy fashion.
OEM under the hood untouched, then black air intake cover removed:
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Dropping in the 2nd battery, note the added L connectors on terminals:
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Intended location for PDM once cover is on & PDM setting in place of hole to be cut out:
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Roughed cutout in black cover for PDM insertion from underneath & 3/4" hole on side for all wiring to exit.
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PDM screwed in place with wires pulled through & lid secured in place. All neat and tidy without using up any additional space under the hood.
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I will seal around the PDM mounting holes with black RTV silicone and as shown you do not lose any space where you can mount anything else needed. The only other spot big enough (that suited me) with the PDM standoff attached is where I want to mount the Battery Isolator which I will not have until 12/30/15. As viewing the bottom right picture with the cap on the PDM it does interfere with the hood slightly and needs to come down 3/8 of an inch on the left side where the hood lies with the body. Thankfully there is 1" of clearance underneath the PDM cover so a little work with the heat gun will reshape this so it doesn't touch the hood when secured down.
Well time to start making a couple dozen Jumper wires for all my lighted switches, no rest for the wicked.