3.6 Pentastar oil pressure sender woes.....

What are the 2 plugs in the valley that seem to go straight down into the block on a 3.6? The one on the left had a broken plug retainer. I had to zip tie it so it would stay on to its male end....What are they to?

<< found them.....knock sensors! >>>

Mine had so much crap in that valley I didnt even see these until I vacuumed out all stop leak grit, oil and coolant that came out the cooler when I lifted it.