Connecting a product base to a product in your shop is a very simple process just be sure you have already created your product base BEFORE you try these steps.
So now that you’ve created some product bases (or are using some of the pre-installed) product bases, the process is very easy to connect them.
Step 1
Open the product you wish to connect to a base.
Step 2
Scroll down the Page until you see the product data section–it should look something like this:

Step 3
Click the tab called Lumise and then click the Select Product Base button

Step 4
Choose the product base for this specific product

Be sure to UPDATE or PUBLISH your product to save your changes.