Nice neat work, Scottie. But you may need to use more than a velcro strap to hold it down. I know ECTA (I don't have an SCTA rulebook at present) require the battery to be fastened down with a metal strap. A couple of screws thru your battery box flanges should satisfy that rule.
Your fuse holder looks like one I recently mounted on a Norton Commando; make sure you have room to actually install the spade connectors, as they add some length to the spades and the wire which protrudes may foul the sides of your box or your battery.
As for wire connectors, I have concluded that no open connection will survive the elements at Bonneville. I have started (or I'll be rewiring my bike before I go back) using the connectors that have a built in shrink sleeve which contains a hot melt glue. Then make sure you use dielectric grease when snapping the connections together. (Note that in the following photo, I have not used the above mentioned connectors, but I will be from now on.)
I also noted that you bought a landyard cut off switch. Make sure it is the proper, i.e. normally closed if you want to run it inline with your ignition circuit, or normally open if you want to short out the points or magneto.
Tom