I bent up this little riser plate that rivets to inside the box. This gets the relays up, off the floor, so components and wiring can pass by underneath.
http://images50.fotki.com/v1522/phot...7/photo-vi.jpg
I used some light duty aluminum riv-nuts for the relay mounts. I only plan for two relays back here but you never know...
http://images60.fotki.com/v778/photo...7/photo-vi.jpg

With all of the components laid out.
http://images57.fotki.com/v1613/phot...7/photo-vi.jpg
I also decided where the Master Disconnect Switch and Starter Solenoid were going to live... THIS is what took me some time. Just figuring out where I was going to stuff all of these components!
The MDS is going to mount at the back lower corner of the battery bracket.
Here is a mock up with a foam-core "bracket".
http://images51.fotki.com/v747/photo...8/photo-vi.jpg
I then made a cardboard pattern which will get transferred to more of that .090 aluminum.
http://images55.fotki.com/v608/photo...8/photo-vi.jpg
Finally getting some real work done...
http://images16.fotki.com/v363/photo...8/photo-vi.jpg
All bent up and ready for holes.
http://images60.fotki.com/v778/photo...8/photo-vi.jpg
Transferring the hole pattern. You noticed I dropped a nice leg back to the battery bracket at bottom. Adds a ton of stiffness to the switch bracket!
http://images51.fotki.com/v282/photo...2/photo-vi.jpg
Ready for riv-nuts.
http://images12.fotki.com/v252/photo...2/photo-vi.jpg
http://images54.fotki.com/v627/photo...2/photo-vi.jpg
The bracket bolts in, underneath the battery bracket. Nice and clean.
http://images108.fotki.com/v1623/pho.../photo1-vi.jpg
The starter solenoid bolts into the end of the battery bracket. This keeps all of the cable runs very short and the holes in the bracket allow easy routing of the 1/0 cables. These pics are with the battery tray removed so you can see how accessible the cables will be.
http://images55.fotki.com/v1604/phot.../photo1-vi.jpg
Most of the wiring will remain out of sight. Of course all of this is going to be enclosed anyway.
http://images57.fotki.com/v81/photos...2/photo-vi.jpg
Thanks for looking. I hope I am back on track for a while.
Mark