What kind of antenna will it be?
If it has radials, it can be placed at the feedpoint.
If it does not, my personal preference has become at 9' from the feedpoint. Opinions abound on how to manage the wraps, but because the wraps are essentially an inductor I believe they need to be side by side touching each other uniformly. Use a non conducting former like a 4" section of PVC tubing, or something similar, to wrap around.
I have used plastic bottles, varnished cardboard tubes, etc. Do not permit your choke to touch the metallic tower.
The tower itself will likely absorb any stray rf, but the choke should help mitigate any rf returning by the coax braid into the shack.
