1. Find the header.php file in the following OpenCart folder:
Catalog > View > Theme > Template > Common

2. Open the file and paste your Sleeknote tracking code before the closing</header> tag. Each Sleeknote is provided with a personal tracking code which you can find under “tracking code” inside your Sleeknote dashboard.

3. Press save and make sure your Sleeknote is activated.

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