Step 1:Installation of the Extension is very easy. You just need to drag your admin,catalog & system folder file into the Opencart root folder and it will be installed.
Step 2:Now, under Extension > Modules, Install the Opencart WhatsApp Contact Button (Chat) module like this way.
Step 3 Now admin will go to Extensions > Modules and then click on Edit button like the image below.
Step 4 Now admin will go to Design > Layout and then click on Edit button like the image below.
Step 5 Now, Front > Orders, View WhatsApp Contact Button.
Step 6 Now admin will go to chat > then click on chat button for like the image below.