Location of product tpl template in admin

[cons]

Prestashop 1.7.8.5

On the product page in admin I want to enter a custom input field in the Quantities tab, near the input
of quantity ... where is this tpl?

In previous versions there was a tab: information, now it seems that it no longer exists. Add field on back office (modify information.tpl) is not working..
Thank you

[Prestachamps]

Hi,
Probably the following articles you can find helpful: 
https://stackoverflow.com/questions/43675696/add-field-in-product-prestashop-1-7
https://stackoverflow.com/questions/71752404/add-new-fields-in-the-product-page-admin-prestashop-1-7
Have a nice day, Leo.