First, navigate to the campaign where you'd like to connect the Vendasta integration. Then, choose "Local --> Vendasta" from the dark navigation bar on the left-hand side of your screen.
Next, click the button in the middle of the screen that says "Connect Account".
In the window that appears, enter the API User and API Key for your Vendasta account. If you're not sure where to find those credentials, please contact Vendasta support. Once you've entered your credentials, click "Save".
Next, select the client you want to connect and click "Save".
If the client that you would like to connect is under a different Vendasta account, you will need to enter different credentials to access that account. To do so, click the button that says "New Account" and follow the above steps.