[Madison]

It's been awhile since I've used Inventor, but there are two things you should be able to do to achieve the desired result.

You can create and define the hole pattern you'd like in one of the parts and simply create, but do not define, them in a second. That means, essentially, that one part is fully dimension and fixed while the second has holes in it, but no dimensions placing them in a certain location. In the second part, set the hole feature as adaptive and, at the assembly level, the holes should move to match the defined holes in the first part when they're constrained together.

You also may be able to create an assembly of the two parts and, at the assembly level, create a new sketch and feature for the holes.

The former is probably the better method, but as I said, it's been awhile since I've used it and the exact process may be somewhat different.