Hi Derek,
Hope you’re well.
You would need to purchase our 5 channel remote, which you can select when ordering your blind.
This allows you to connect in your case 3 blinds to each of there own individual channels and also allows you to have all blinds connected yo the final channel.
You can have up to 5 blinds on this remote, 4 on individual channels and up to 5 blinds on the final channel.
Let me know if you need further assistance as I am always happy to help you.
Best Regards,
Emma
Customer Service Advisor