Mass Attachment of Class Char to MIC

Hi Gurus,

Iam in the middle of implementation and I have uploaded all the characteristics in MIC QS23 and CT04 i.e.Class Char through LSMW .

Now I need to attach Class Char to MIC in QS23 T.CODE for all the 850 MIC.

How can I do this because LSMW doesnt work for this i guess.

I require the steps to do this.If there is any BAPI OR BDC which can resolve my issue then let me know if there is any.

Regards

Nilesh S.