This is at a bit isolated location though pretty well connected by a mud road. At about a kilometer or so in a northeast direction from the Chandrashekara temple you can spot its polygon structure. Most probably a makeshift thorny gate closes the mud road (what you see in the picture is the Saraswathi temple nearby).
Just jump over it and proceed. No one would question you as this has been made by the local flower farmers to protect their flowers being eaten by the wandering cattle! For all that matter a lone farmer (the only pathfinders available at times) can direct you to the location.
The same trail you taken from Chandrashekara temple to here continuous its way eastwards. This winding mud path along the edges of the fields can lead you to Srinagarada Hebbagailu (the huge gateway to the citadel), located behind the Elephant Stables.
Octagonal Bath at Hampi