One of the main differences between other website builders and HostGator, is that your source code will need to be turned into a URL format, so let's do that! In your Billsby account, head to Settings > Embed codes. The code we'll be changing is the top code:

What we'll be doing is putting this in a new format, which will look like this: https://checkout.billsby.com/subscription?data-billsby-company=televist
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All you need to do is find the company domain, in this case televist and replace the last name with your domain, and that's the URL you'll need for later.

On your HostGator website, navigate to where you want your subscription window to be, and enter the editing mode. You'll see a panel on the left hand side of your builder, you'll want to click the elements section, click files, and scroll down to where it says HTML/Page Embed and select the Page Embed, drag it out to where you want your panel to be.

Once you've got the panel where you want it to be, click edit URL. In the Section that pops up, just paste that URL we made earlier!

You can also do this for your self-service modal, following almost the exact same method as above. If you're adding the self-service modal, all you need to do is use this URL instead:
​https://checkout.billsby.com/management?data-billsby-company=companyname

All you would need to do is change companyname to your domain again!