Any thoughts on a repair?

It's strange, because I had pulled out the propane box to put in a bracket to 'shore up' the loose Jack on that corner. You can see pretty well up above that sagging corner, I took a couple of pics up there. The pics don't show all of the wood that I could see, but all the wood and braces up there was not rotted and perfectly intact. (There's some rot right on the edge by the wall, but nothing load bearing.)





That one spot looks bad, looks like the wires burned it, but on closer inspection I don't think so. Everything up there looks good and solid.