how to pass header field in soap channel

Hi Experts,

I am working Proxy to soap synchronous interface and I suppose to send data like below.

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Here problem is Header and body both structure are not able to select at a time from external definition which I imported for soap structure. To achieve I suppose to do either create custom structure with header and body with envelope or add that header filed in communication channel to pass in request.

But I don’t want to create custom structure, so please suggest be how to add that field in channel level?

And which adapter message protocol is better (soap or axis)?

Is there any other possibilities to achieve easy?

Please note even I cannot change prefixes such as <soapenv:Header> <edoc:ApiAccessToken>

Thanks & Regards,

Maheswarareddy