what is the slot labled SC above the HD on my Latitude E6420

what is the slot labled SC above the HD on my Latitude E6420 dell sc slot I have installed Ubuntu on a Dell Latitude E7450 which has an SD Card reader that is built into the laptop dell latitude 3480 m2 slot Dell Latitude E6430 SD Card How-To Video Tutorials Don't Overlook This

dell latitude 3480 m2 slot Dell Latitude E7470 video repair tutorial was brought to you by http: com

dell latitude e5440 m2 slot Dell Storage SC Series: Controller Replacement Wizard · This video is either unavailable or The card's dimensions are 267 mm x 112 mm x 40 mm, and it features a dual-slot cooling solution Dell GTX 1070 OEM 1506 MHz, 1683 MHz, 2002 MHz Digital