When creating a new Amazon Listing, you can choose how orders for that listing will be fulfilled.
1) In the Attributes section of an Amazon configurator, add the 'fulfilment-center-id' attribute
2) Either map this attribute to an extended property that contains the fulfilment center ID, or add one as a default value
Fulfilment Center IDs
DEFAULT - FBM product
AMAZON_NA - North America
AMAZON_EU - European Union
AMAZON_JP - Japan
AMAZON_CN - China
AMAZON_CA - Canada
If you don't set a fullfilment-center-id attribute, the listing will be created as an FBM (fulfilled by merchant) listing.