Open Webs Editor
Navigate to the page where you'd like to add your Ecommerce plugin.
Add HTML Code
At the bottom of the Webs editor are the various site components. Click Other to reveal the Custom HTML component. Then, drag the Custom HTML component to where you'd like your Ecommerce plugin to appear on the page.
A gray Custom HTML box will appear on your page.
Double click the box to open the popup where we'll paste the HTML in the next step.
Paste this code into the gray box and save.
Note, Webs elements don't automatically adjust their size. So you might need to increase or decrease the height of your HTML box. To do this, just change the height="600px" to a higher or lower number.
Edit your Ecommerce on Webs:
Go to the live Webs web page and select the Settings Icon in the upper right corner of your Ecommerce Plugin.