[SOLVED] EBS can only connect with a single OTM domain?

From an old OTM-EBS config document, I found this sentence:
'EBS can only connect with a single OTM domain. You can use the delivered EBS domain in OTM, or create a master domain to suit the implementation'

Is it overdue knowledge?

If I have two parallel domains (ex. Canada&Mexico ), can I config the EBS profile to send the orders into the corresponding domain? Canada orders sent into Canada domain while Mexico orders sent into Mexico domain.

Thanks