To bulk assign your products to your Amazon listing template please follow the steps outlined below.
Please click on your username -> select connections-> edit Amazon
Next please select 'listing profiles' and assign products
You will then see the below page.
From here you can search by SKU reference and assign products individually to this listing template or you can bulk select all of your products and click assign products.
If you have assigned products to your listing profile and you want to apply the changes from this listing profile to your live listing on Amazon please click on the link below and follow the steps outlined in this user guide.