I got the Saf-Air oil quick drain for my IO-390. I installed it in place of the plug on the aft face of the sump, near the center left-to-right, which I understand to be where the RV-14 and RV-14A prototypes both have it mounted. It is an NPT so I installed it finger-tight plus a full turn. Now I need to twist some lockwire onto it. But I don't see any obvious places on the engine to run the lockwire to. Does anyone have any pointers on where to aim the wire?