Firstly, sorry about my ignorance here guys - Im no mechanic so just trying to learn my way.....
Would someone please be able to identify what appear to be "holes or openings" on the pics and advise what they are, and if there should be anything attached? Seems a bit strange to me to have these openings that could allow foreign bits into the bowels so to speak!!!
Thanks in advance!
PS - in pic "B", Im assuming the hose which was just hanging loose should be attached to the pipe arrowed? The other end of the hose is attached to what looks like a cylinder attached to the back of the block!!












