Cam plate oil hole for timing chain?

Leave the bolt with the hole in it on the bench. You can drill a small hole in the plate on either side. That bolt is worthless.

If you want to be really cool, you can tap the plate and screw a .032ish air bleed in there. I know people don't really like drilling holes smaller that .125 and that's just too big. That's how I do my stuff. I screw an air bleed into the plate from the gallery side.