Ideal Drogue setup will require experiments
For maximum maneuverability, the control lines—one port, one starboard—should attach at the widest part of the boat. This maximizes leverage and places the effort close to the center pivot point. On a catamaran, closer to the transom works because of the wide beam, but for monohulls, attaching near the pivot point at the keel will be more responsive. For maximum responsiveness, the drogue should be as close to the transom as practical—this results in more responsive steering and minimal drag. We found the best compromise to be around 65-80 percent of the way aft, where there is still enough beam, but less risk of the control lines fouling.