FIELD_SYMBOL INTERNAL TABLE WITH HEAD APPEND

HI

I need to append a record to the internal table 'TKOMV' in the SAPMM06E program.

The table is declared

*------- TKOMV ( Tabelle der Konditionen im Beleg)
DATA: BEGIN OF tkomv OCCURS 50.
INCLUDE STRUCTURE komv.
DATA: END OF tkomv.

And a need to access from the a FM User-exit 'EXIT_SAPLMEKO_002'

I create a FIELD-SYMBOLS <fs_tkomv> TYPE ANY TABLE.

ASSIGN ('(SAPMM06E)tkomv[]') TO <fs_tkomv>.

But i do not know how to append at it.

Can anybody help me?

Thanks!