To install Checkout Success Details, you'll first need to make sure that you have vQmod installed on your OpenCart store.
Once you've purchased the Checkout Success Details module, download the corresponding files for your OpenCart store version. Next, upload the contents of the 'Upload' folder to the root directory of your store.
Log into your store's admin area and navigate to Extensions > Modules. Click install next to Checkout Success Details.
You can now edit the module to configure the options to fit your needs.