header data in RPGLE WS wsdl2rpg.sh

Hi Experts,

On a Website I found a link to create webservices with a standard tool that is available on the IBMi "/QIBM/ProdData/OS/WebServices/V1/client/bin/wsdl2rpg.sh"
The result is a Service program that contains all required info to call the webservice.

I'm able to fill the WS variables, but I can't find where and how I can add header elements like :

<httpHeader>                          
     <header name="Accept-Encoding" value="gzip,deflate"/>               
     <header name="Api-Key" value="123456"/>   
     <header name="Host" value="api.web123.com "/>        
     <header name="Connection" value="Keep-Alive"/>                 
</httpHeader>   

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(of course, the value data is variable)
How can I add these to the WS-header  

Thanks