Attachment list from customer master sales area data

Hi all,

I have a number of customer id's and need to identify whether there is an attachment attached to the customer master within

sales area data, not general data view.

To identify this for general data view I go to table SRGBTBREL and enter the following criteria:

RELTYPE: ATAA

INSTID_A: customer id

TYPEID_A: KNA1

Execute and it will show me an entry if there is an attachment in the attachment list. I have tried to select KNB1 or KNVV for TYPEID_A

in order to identify attachments to sales area data view without success. How can I identify these?

Thank you in advance.

Regards,
Patrick