I got a 1988 323 (US) GTX turbo parts list/diagram from my friend who works for Mazda. Many of these parts can be used on the VJ 20 too. Letter C is the coolant nipple for the block and D is the banjo bolt for the oil supply. I thought this might be helpful for some. I don't think that this is copyrighted. It is out of a parts book that Mazda uses internally.
diagram
diagram
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