WSDL with Multiple External Reference XSD's for SAP PO Message Mapping

Dear Experts,

I have a WSDL file with multiple XSD references provided by client.imported it in SAP PO through tools as it contains multiple reference XSD's like below.

when i try adding it in message mapping, either i could add Header or LoadRq at a time but i can't add both in single message because of same hierarchy.

but the shared sample payload contains both the nodes in a single soap envelop like below SOAP Header contains Message Header node & Body contains LoadRq node.

so experts could you please help me out,whether i'm missing something to achieve this mapping ?

Regards,