1850 flywheel allignment

[Tallpaul]

Hello all not sure i understand this in the Haynes manual.
I can see the marks in the manual.
But whats the idea behind that
Ta
Paul

[Tallpaul]

Am i right in thinking the crankshaft could be in 1 of 2 (180 deg) postions with the marks aligned

[yorkshire_spam]

My 1850 is an auto... so no flywheel so I have no experience.
Checked my 1850 workshop manual, no mention of alignment in the removal/refit instructions.
Sorry!

[yorkshire_spam]

Wsm page