As above using the flat bar, or 5mm rod in back of cams, and the black longer pin, turn engine to roughly tdc, then back a bit, then put pin in, turn slowly with plugs out clockwise and you will hear and feel the flat edge of the crank(machined just foir this) contact the pin.
This is certainly how I do it on silver tops, thought the black was same in this respect.
tabetha