After I un-torqued the injectors and removed them and was removing the heat shields / seals / crush rings / I think I've covered everything they call them, anyway taking these out with a magnet, there is this black plastic sleeve like part, w/ p/n 601-017-0150 and a marking of 180 Deg. on the outside edge of them. They slide down into the outside edge of the injector chamber before the injector is inserted. Must be a dirt catcher or maybe just a heat shield of some kind.
Also these holes in the cylinder head are just outside of the injector chamber toward the outside of the cylinder head and are quite small and not round, maybe 5 or so mm wide. Looks like some type of a casting mark or whatever.
Will post my findings. On the way to get my jectors re-built.