Wire Harness advice/help

As far as what could get damaged sitting in a box, I am only worried that if the wires are fairly brittle from the dry climate, they may crack or get disconnected in some fashion.

The harness is rather clean and I have a spare harness from a parts car, but it was pretty rusted since I picked it up when we were in Houston, so I may not get many parts of it.

All this being said, I will try reusing the original and hope for the best. I could certainly use the 500+ bucks elsewhere.