05LLBeanWagon

So I bought this LL Bean edition wagon. Cool little car, clean, good condition. PO says its got an oil leak and knocks a couple hundred off the price. I turn wrenches on my days off from the fire department and figure I can get it fixed and let me kid drive it to school. So... I get it on the lift and find the leak, except I don't know what this thing even is? Someone wanna point me in the right direction? https://imgur.com/a/5tiRxMZ