Look in the manual at the page headed 'headstock; gears & shafts. Find 1151 end plate. It has four holes in it. Adjacent is 1192 Plate screw, called out as 3 No. (wrongly depicted as a cap head screw). The splash guard stud goes in the fourth hole in 1151.
Download the French version of the Chipmaster manual. On the page 'La poupee ensemble mechanique', it is part 20, securing part 19 with three of standard part 46-216 accompanying it. The index of standard parts in the pack of that manual tells you what 46-216 is.