HTTPS connection with certificate PI 7.30 AEX

Hi experts,

I need develop the scenario image below:

SOA ----> HTTPS + User Authentication + Certificate ----> SAP PI ---->  RFC ----> ECC

                               SOAP ADAPTER                                                        RFC ADAPTER

I was using this document to generate de request into NWA, tthe document below is showing PI Dual Stack and AEX it's just single stack java:

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/60ff2883-70c5-2c10-f090-a744def2ba66?QuickLink=index&overridelayout=true&46076409189800

I've created the certificate in NWA, export it and validated at SAP Market Place: "Maintenance&Service‟ - " SAP Trust Center Services‟ "SSL Test Server Certificates‟

But how to procedure ? I must export this request simple certificate and give to SOA System ?

The SOA System must provide the certificate public key ?

Thanks.