Just doing the greasing on my 66. 230, the owners manual shows three grease nipples on the drive shaft
I can only see two ,the manual shows one at the front and two at the rear,the one in the carrier is accessible
through a small port in the carrier,mine has the port but no nipple or provision for it,was it omitted on some cars.
I have done 19 in total

. Cheers .Mike.