Step 3: Choose the shopping cart that you would like to integration. Magento, OsCommerce and ZenCart are using the same integration method.
Using Integrated Platform
Step 2: To import your order, click the “Import Item(s)” button. Your OpenCart order must be in “Processing” status in your store for the “Import Item(s)” function to work.
Step 3: To forward your order to payment, select your desired order or all order using the check box given.
OR
Step 5: Click “Send to Merge” to merge your order if the orders have the same address and you will be directed to payment process.