Cut the Flooring if Necessary
If there are posts or columns in the room, roll back the flooring and mark the size and location of the opening on the underside of the material. Make several cuts across the outline like slicing a pie. Also cut a straight line from the hole to the edge of the flooring that will rest against the wall. Roll the flooring back into position and smooth it around the post.
Slip a scrap of plywood under the flooring before cutting the hole to protect the material below. Cut holes in the flooring a little small for a tight fit. The holes can always be made larger if needed.