what database table are attributes assigned to products in zen cart

I am running Zen Cart 1.3.8a. I am trying to sort out a customers product attributes and clean up duplicates that they created, they have many attributes – Over a 100
I have tracked the attribute tables , but I cant seem to find what table they are assigned to the products in. Can anyone help with this ? Thanks !

All of these tables are used to build and maintain the Attributes of the products ...

Holds the Option Name types:
products_options_types

Build the Option Name and Option Values components:
products_options
products_options_values
products_options_values_to_products_options

Build the Attributes themselves:
products_attributes
products_attributes_download

Ajeh,
Thanks for the response that is a big help,
I see where products_options_id in product_options is products_options_values in product_options_values then in products_options_values_to_products_options it is stored as product_options _values_id

Do you know where the attributes are stored or associated to the product ?

The last two tables that I listed ...

That is where they are built ...

Ajeh,
Thanks for the response that is a big help:clap: