Click on the icon highlighted in the picture below:
A confirmation message appears, informing you that the company exists on the platform. If the name of the company matches your customer's company, confirm by clicking Yes. Note: an hourglass appears in the status column, that means your customer has not accepted the connection yet. They can accept it as shown in step 5.
Your customer(s) will receive a task in their own account, informing them that you're trying to connect with them. Your customer(s) must approve the connection with you
Once the connection approved by your customer, a green checkmark will appear next to them in your clients' list.