Passing Ship To Location/Requester's Location as part of cXML for Punch Out

Hi Team - Our client is from the hospital industry and they use a lot of Punch outs. We have a requirement related to punchout to the Medline supplier, we are using the direct cXML method for punchout to Medline. Recently Medline has upgraded their system and now Medline is asking us to send them deliver to location(Requesting Location) as part of the punchout cXML so that Medline can direct the requester to the specific catalog on their site depending on the requester’s location. But as of now, the requester’s location is not exposed as an attribute in cXML and