Cross drilled disc rotation direction

[g88]

I need to re-confirmation from cross drilled disc sifu..

Is this the correct direction the disc suppose to be ?? I am referring to those "curve" on disc since terbalik L and R side also can fit one :unsure:

Some said suppose to "follow" the wheel rotation but some told me need to terbalik

LEFT HAND
http://img489.imageshack.us/img489/183/lfdisc7vv.jpg


RIGHT HAND
http://img519.imageshack.us/img519/3982/rfdisc7ac.jpg

Pls englighten me