I have to say that buying Fenders is a minefield; maybe it was Fender's plan to sell new guitars: allow the market to become flooded with fakes, so the only way to be sure is to buy new!
Yep - it's the anchor, with the conversion bridge at the other end.
I had been intending to put it on a P, but then this body came up.
I may find myself having to drill through and use bolts, or add an anchor/tailpiece, though.