Disco 200tdi timing - finding cam shaft equivalent of TDC

Greetings,

I've got my flywheel locked with a pin at TDC, and a timing pin locking my injection pump, w/ regards to the cam though, I'm just wondering if having the dot lining up with the "raised bit" of the timing case body (can't think of what to call it) on the cam shaft pulley is good enough for setting the timing, or whether there's a more accurate way, perhaps using the rockers on top?

Any tips appreciated!

mark on pulley and casing is correct

thank you james