Once your reader is connected you are then ready to take a payment via the Stripe Terminal.
Follow your standard process in Point of Sale by selecting your account, user and services to build your payment cart.
Once the Total value is populated and you are connected to a Stripe Terminal you will see the Pay Now button is active and you can continue to take a card payment.
Assuming the card payment is a success your Point of Sale will clear and you will receive an on screen notification that your invoice and payment have been created, then the Point of Sale will reset and you will be ready for your next transaction.
Note: if you need help connecting to a location/reader, please check these articles for further information - Discovering Readers & Connecting to Readers
Payment Scenarios
There are a number of scenarios where the payment will not complete immediately, these are detailed in this article: Stripe Terminal - Unsuccessful Payment Scenarios