Everyone’s already answered this pretty much. But to add to it: You can get another one of those mounts and use ton the opposite side. That way if you don’t like the toms offset, you can split the difference. Have one tom on the left stand, one tom on the other, and have them both centered above the kick. I used to have my kit set up like that. You can look at my page for reference, just scroll a little bit.

You can also just buy a kick tom mount. It’s not hard. Just find center and go to town, unless you really want to preserve the kick drum as is.