Manual insertion of the CTB script

First, let's prepare the line of code we need to insert.

We'll start with this template:

<script type="text/javascript" src="https://cdn.hextom.com/js/eventpromotionbar.js?shop=xxxxxxxxx"></script>

Notice a part of that line, toward the end, that reads "xxxxxxxxx".  You'll need to replace that part with your shopify URL. Be sure to use the myshopify URL  (example.myshopify.com).

Next, you'll need to get into the code editing space. For that click on: 
1 ) Online Store
2) Themes
3) Then click ellipses drop down(on the right side of the page)
4) Click 'Edit Code'


Next click on theme.liquid found in the Layout folder:

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In the window with the code, scroll all the way down to the bottom. You'll see '</body>'  in the code. Just above that is where you'll paste the line of code you prepared earlier.

Then, click "Save" in the top right.
Check out your site to see if it's working correctly.