I did my first oil change on my 2013 JK this evening. Messing around under there was fun and all, but I found something weird. There are these two black rubbery "plugs" just behind the oil pan drain plug. They are recessed, and when I poked them with my finger they felt soft/gooey/spongy and warm to the touch. Almost felt like they were the only thing between my finger and some hot vehicle fluid. I have absolutely no idea what they are, but figured they might be some sort of fluid expansion/blow plugs??? Most blow plugs I've messed with were brass. These certainly felt like something that could easily get scraped off driving over rocks or screwed up if I sealed/painted over them.
Can anyone tell me what the heck these are? I stole the photo below from the internet, but they show the plugs very well.