Completed the switch installation and very please with this, economical priced, function and quality.
Used a fuse tap to grab power out of the fuse box, drilling the hole so the wire is forced through to maintain a seal. Always use shrink wrap connectors and a second layer of shrink wrap for a solid life long splice. These fuse taps you place the removed fuse in the lower slot and the accessory fuse in the top slot for a tidy and safe steal of ignition power. Left plenty of slack for removal of cover.
Drilled the mounting pattern for the new accessories switch panel box in the cover and mounted studs for attaching. Sealed with a tin rubber washer on the inside and locked down on the outside with a locking flange nut.
I cut the power harness down (see earlier post for original form) and spliced the battery connection back on rather than roll it up for much cleaner installation. Doing this required location the ignition wire in the box by ringing the wire as they are all the same wire. Once isolated I clearly marked it with a stripe using a black sharpie.
Also reduced the length of the accessories harness in the same fashion, reinstalling the original protective loom, shrink wrap sealed the 2 additional leads not used at this time and leaving slack on both so the cover OE cover can be removed with ease.
Pleased with the finished product, everything in protective loom and tied of safe from chafing and damage.
Dash location worked out nice as well.