Based on some online pictures of cockpit areas some 46s seem to have cruising chute blocks about half a meter forward from the stern cleats. Is there a folding padeye somewhere there?
If no padeye or suitable reinforcement visible, it seems that the stern cleats are at ideal position to just attach turning blocks with short straps / rope loops. That is what we did on our previous boat.
BR,
Tommi
s/y Anniina