Uploading multiple existing products in bulk

Hello again!

I have several hundred products to add to my offer. These products are already in the Amazon Catalog. I just want to connect them to existing listings.

Adding products by Add products is simple but time-consuming and you can go crazy …

I tried to do it with Inventory File Template. However, I had to fill the product type (category) and the title of the product.
It makes no sense, because these products already exist and have already been assigned a category and title.

How to create a template where I only enter EAN, SKU, price, quantity, country of origin and item condition - like i do in Add Products? Is it possible?

Please save my time and brain

Best regards!