hi, i have a 1995 contour LX 4-cyl. is this the correct spoiler?

http://cgi.ebay.com/ebaymotors/Factory-Spoiler-for-a-Ford-Contour_W0QQcmdZViewItemQQcategoryZ46093QQihZ008QQitemZ180013829394QQrdZ1QQsspagenameZWDVW

and how do i put them on, do they have screws on the bottom, and do i just drill holes in my trunk and put some nuts on the end?

thanks!
-Nate