XSD element - add attribute

[Quickill]

Hi,

i am importing XSD files into EA repository to maintain model in EA. I made some changes in model and try to generate new XSD, but there are missing some attributes, they were in original XSD. Is there any way, how to add random attribute to element (red marked)? Tryied to add it into tagged values, where i can find min/maxOccurs too, but its not generated to output xsd file.

<xsd:element name="checkScanMassFile" type="xsd:base64Binary" xmime:expectedContentTypes="application/zip">

Thanks!