CB200 Cam Chain Sprocket on Crankshaft Align

[TGubbins]

Have split a Zongshen CB200 Crankshaft to replace a conrod.

I sadly did not note the Cam chain sprockets orientation on the crankshaft (doh)

HumanBeing fwd'd some great references:

http://www.ctx200.com/files/xl200_workshop_manual/
and
http://www.motorfans.com.cn/forum.ph...uthorid=343764

however am still not totally able to discern what I need to know:

Do I align a sprocket TOOTH or TROUGH to the crankshaft keyway at TDC??
(See pics)

Does anyone just happen to have a true side view of this area?