Just leave it alone.
Yes! Above! +1
Just run your tank as normal and he will find a spot.
They like to find their own spot. Mine sits in a corner, on a flow, been there years now. Once in a while he moves a few inches, then returns to the same spot.
Or
He will start to "come apart" then OK to discard.
Make sure your SW numbers are on point and remain stable.
Make lots of light available.
Don't change flow pattern or direction.