I would check behind the radio to see what color wires are there for the exterior speakers, if they didn't wire both then looking there should tell you, on the other hand perhaps the wires were pulled away a bit. Also, I noticed in pic one what looks like a double black/black grey wire and pic three a double white wire. Most speaker wires are double wires so (two wires molded together) so again perhaps looking at the radio would help, or if yours is like mine (perhaps not) then there is a switch at the door for the exterior speakers which on mine have both left and right wires there.
Also, speaking of the speakers, mine did the same thing and rotted out the cones, likely from the extreme heat here in Texas
. I only replaced them (primarily) due to the fact that they were similar to having an open window and not boxed in so hot air, bugs, or whatever could simply come right inside the cabinet from the no-sealing rotted out speakers. I also suspect opening and closing the RV door likely doesn't help them any as when I changed mine I could feel the air pressure with the speakers out when someone opened and closed the door. If my new ones don't last long then I may just seal the opening from the inside with a round cut of plywood and attach the covers to keep everything looking good. ~CA
BTW, Welcome to the JOF (Jayco Owners Forums).