I was curious to know what wire you had to lengthen. Negative battery wire? Ive never heard of anyone needing to do that to relocate the battery. Maybe its cause I turned the battery around backwards in the tray?

How's that freak bracket braced? Does it have any bracing on the sides or is it just an L shaped piece that you bolted to?

Wondered if it would sag in the future from the weight of the battery. Cant really see how its supported though.

Looks good, I'd probably move that negative wire "up and over" instead of "down and under".