Archiving data in BW 7.3 - Extractors for CO objects from ECC

Dear Friends,

I am Archiving data in BW 7.3 version- 

Please help me to identify correct BW Extractors for CO objects given below

1.  CO_ML_BEL

2.  CO_ML_DAT

3.  CO_ML_IDX

4.  CO_COPC      (product costing)

For CO_COPC ; I have identified as    0CO_PC_PCP_20 ... product costing analysis,

and pulling data into 0COPC_C08 Info cube.  Let me know if this is correct ?

Thanks,

Aby Jacob