You can set Omnivore up to use any of your Magento website stores.
Choose which store you want to use and put the ID into Omnivore.
- Go to "settings --> feeds".
- In the fields Magento Website ID and Magento Store ID, enter the ID you have in Magento.
If you would like to send your orders to a different Magento store id please go to Send orders to different Magento Order Store ID
See screenshot below to find the ID in Magento. The number showing in the hover text is the ID. Hover over the required Website Name, Store Name and Store View to get the correct id's for your omnivore setup.