Locations is 0 when I import products via Dsers

Hi,
I am a rank newbie. I have managed to setup a store (I think) and a Dsers account.
But when I import products the location is set to 0.
I think this is why they don’t show on the website.

How do I set the location when importing from Dsers?

Thanks

I can see how to change it in the shopify list, but I would like to be able to set this on import from Dsers so I don’t have to go through & set it for each product.
Really appreciate any help.
THanks