Upon your purchase of Cam Unlimited, all eligible cameras are automatically assigned to your Cam Unlimited plan. There's no need for you to do any manual assigning!
The only way to remove cameras from Cam Unlimited is to cancel your Cam Unlimited subscription since this plan is associated with your account and not specific cameras. Please note that Wyze Services are non-refundable. When a subscription is canceled, the service will remain active until the end of the billing cycle and will not auto-renew.