It appears to be 30 pin if 1920 x 1080. But if your screen is 2560 x 1440 or 3480 x 2160 then 40 pin. That information is available at laptopscreen's web page here. Also go to this page at Parts-People and type in your service tag number on that page. It will confirm compatibility with the correct screen.
2013 Alienware 17 R1. I cant find if my laptop is 30 or 40 pin for the screen connector?
17 R1, 30 pin or 40 pin? (buying new screen)