How to Pass value in SOAPHeader in WebService

I am going to integrate with Telco webservice. They provide webservice and webmethods.
I found there are SOAPHeader and SOAPBody.

<soapenv:Header>
             <v2:RequestSOAPHeader>
                             <v2:spId></v2:spId>
                             <v2:spPassword></v2:spPassword>
             </v2:RequestSOAPHeader>
</soapen:Header>
<soapen:Body>
</soapen:Body>
      
How can I pass the information for the SOAPHeader property -  spId, spPassword?

Please help.