Can someone tell me if the marks on the front pulley are at TDC and 20deg, or 5 after and 20 after?

I'm trying to tune my spark table, I set up my EMS to assume that the left (Leading) mark is TDC, if this is incorrect it's going to make me lose a lot of power!

 

I believe they are 5ATDC and 20ATDC, based on this in the FSM:

 

you are correct

 

so stock is tdc plus 5* advance? on what side of the marks?

 

If you want to find TDC. Point the "key slot" on the E-shaft directly towards the exhaust side of the engine. This will be TDC on the Front rotor.

 

5 deg ATDC would be 5 degrees retarded.