The attribute SKU system allows you to set SKUs on the attribute level. You can perform the following steps to enable the attribute SKU system:

1. Login to your SEO-Cart account and go to Configure->Store Settings.
2. Once here, enable the checkbox for “Enable product attribute SKUs” under the “Miscellaneous Settings” section and Update your changes.
3. Once attribute SKUs are enabled, you will have the ability to set the Attribute SKUs when modifying or creating a new product within SEO-Cart for products that have attributes added to them.

Once a SKU is set on the attribute level, this SKU will automatically show up on the website once an attribute is set for a product.