Those "holes" actually look like that rare, maybe super rare, factory option that I have heard about. One school of thought was they were for those oil change "specialists" so they could easily do an oil change without overfilling - they could simply fill until it ran out the holes - makes an oil change much quicker as they don't have to measure anything. The other school said no - that those holes were for greasing the lower bearings.
I am not sure which of those I believe in, but I do think it is "super rare" and would bring a pretty good sum on ebay.
C