Lock wiring sump plug

Hi list,

A while back I asked about lock wiring a sump plug and there was a pretty 
even split as to whether or not it was worth/needed doing.  Well I am going 
to do it and it occured to me that I did not know what it was lock wired to?  
All you lock wired sump plug people tell me what you wire it to bearing in 
mind I am using a Ford/hybrid gearbox.

Incidentally I have another magnetic trap sump plug to use for this.

Daniel1312