First roof leak found

Well, today we found our first roof leak.  Chad asked me if I'd found any leaks.  I hadn't seen any.  Then, a few minutes later, I was sitting at the computer & a drop of water hit my head.  Sure enough, there's a roof leak in the cabinet above me. 

Looks like someone has put silicone on this leak before, but it didn't fix the problem.

I'm not even certain where this wire runs to.  This side of the RV is the side that none of the lights work on (just in the front). We think a mouse probably chewed through the wires.