The engine oil generally always goes into the valve cover. On any normal vehicle engine gas or diesel.
Not sure what your engine is because what you said is not a real displacement for any common engine from that era. However if it’s a workhorse chassis then it’s a Chevy, right?
Likely has a 454/7.4l. And if that’s 2 quarts low it’s real close to being low enough to do damage.
But yeah pour oil in the valve cover.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold