Oil Change Big Surprise '16 Vantage 4.7L

[offlinej]

So after weeks of obsessing over just what parts to buy I decided to get started and got it jacked up fine. Took off metal under-plate, emptied reservoir, then went after three bolts on the bottom of the "block" with 13mm wrench. Lo and behold only found two such bolts which nice enough when undone let out some oil. NO 3RD 13mm BOLT. Complete visual search and hand exploring, only one other 13mm was part of an ancillary mounting right near oil filter. What I did see right near other two was very professional milling of conical depression, mirror finish, Picture too big, but it shows the two black new reservoir bolts and in the same general area this machined out cone.
Filter no problem Fram PH 9010. reservoir bolts Chrysler Engine Oil Drain Plug 6506214AA, many many crossreferenced uses, and the copper washer is another very standard item OD 1", ID 0.64" (used xtra for my '67 Etype).
So after all that worry and angst, nothing too it, standard cupla buck parts fit just fine. I know this is a contentious issue on some forums but just make your own judgements. Oh, I paid $11.00 U.S. for a download of the factory shop manual through 2016 hoping for a picture of the bottom of block with third bolt or not location, turns out it runs through 4.3L. Thanks to all posters on oil changes and jacking. Any help on third bolt?