Thanks.... Yes a lot of people has ask me about that and the answer is yes is in top of the carpet for a few reasons....
I wanted minimal damage done to the existing structure in case I ever decided to sell the house and the buyer didn't want the room there or even if one day I just decided to knock it down.
I cut a small square of each carpet area where the anchors are to minimize carpet damage.... I didn't want to cut the whole area out and than having to replace the whole carpet if one day the wall comes down. I like to think of it as some what modular... Others call it ghetto... lol --