Autodesk Constraint help

I downloaded the new linear slide .STEPs and converted them to .ipts, but how do I constrain something to the center of these square holes?

Do you mean how do you constrain a circular object to the square holes (like a spacer to the c-channel)? If so, you can use a tangent constraint, click on the inside circle of the spacer (or whatever object), then click one of the sides of the square hole, and offset .009 inches. You repeat this, but constrain it to the adjacent side of the square hole, then it’s constrained.

Thank you so much!

No problem