Exactly correct. The USB connection is for Bluetooth and not plugging it in will not affect WiFi.
Recently bought a Dell Optiplex 9020 SFF, then found it doesn't have Wifi. Day 1, the power supply packed up! Replacement in the mail. Have bought a tp-link AC1200 Wi-Fi Bluetooth 4.2 PCIe Wifi/Bluetooth card/adapter.                 Am I right in thinking that if I don't plug in the USB connector from the Wifi card, I will get my Wi-Fi connection but sacrifice Bluetooth? I can live without Bluetooth. The 9020 SFF appears to have only 2 internal USB ports, both of which are in use as front panel connectors. Thanks for any and all advice! Chris
Dell Optiplex 9020 SFF Bluetooth question