What the pictures dont show is how I got the caulk in there. I removed all the bolts holding the main baffle and raised it about 1/4". I attached a clear hose to the nozzle of the caulk gun and filled the back under the plug wires using the hose. The rest was pretty simple just using the nozzle.
Closed it up and bolted it all back together. Safetied a coupe of bolts also.