Hi the last picture the valve is on the underside of the fitting on the right that accepts the connector pipe from the outside of the block it points vertically down to the Base of the sump pretty much in line with the torch in the picture
All simple to dismantle I would personally take the whole thing out for ease of access the pipe with the t union on with the valve as getting in for the crank weights can be fiddly but everyone's different how they do stuff you may find just taking the valve off in situ easier than I did ?