app/overrides/spree/admin/shared/product_tabs.rb
Deface::Override.new(
virtual_path: 'spree/admin/shared/_product_tabs',
name: 'uploads_product_menu_tabs',
insert_bottom: 'ul[data-hook="admin_product_tabs"]',
text: <<-HTML
<%= content_tag :li, class: ('active' if current == :product_uploads) do %>
<%= link_to_with_icon 'cloud-upload', 'Inventory uploads', inventory_uploads_admin_product_url(@product) %>
<% end if can?(:admin, Spree::Upload) && !@product.deleted? %>
HTML
)