Hi EugeneGoldgar1,
Thanks for reaching out to Microsoft Community and posting your inquiry.
The Surface Connect port is use for power delivery, it's where you connect the charger to charge the device. The Surface Connect port is use for Surface Dock connection. Surface Dock is a surface accessory wherein you can use it for multi-connections for USB ports and etc.
If this answers your question, we highly encourage you to inform our Community by clicking on Yes or marking my post as an answer. This will help other members who may have the same issue as you. Otherwise, don't hesitate to update us so we can further assist you.
Kind regards,
John Neil_J