MIGO and MIRO Relation

Pls help.

is there any way out to relate MIGO number to MIRO Number in EKBE table.

MIGO-- -EKBE-belnr --

when E and 105.

MIRO-- -EKBE-belnr --

when Q.

i am facing above problem only when EKBE-lfbnr is blank for both cases.

pls explain only in case of EKBE table.