PCV Port

I'd drill/tap those and then epoxy in a short stud of all thread. Once you tighten the nuts onto them to secure the baffle use a punch to swage the end of the stud to prevent the nut ever coming off.

I'd also put a fiberglass or aluminum washer under the nut. The idea being to keep heat from putting tension on the threaded joint and working the screw or stud out of the hole from heat cycling.