I believe most EST bindings come with an adaptor that allows them to be used on non ICS boards. That is definitely not an ICS board that is designed for use with EST bindings.
The model of board you have is a 2007 Burton Un Inc. You may or may not need a special disk for that board:
http://www.snowboardingforum.com/boa...-bindings.html
Most bindings are designed with 3 screws in a trainble formation. Not sure what the deal with the straight line is. I'd give Burton a call directly, to see if you can fit any regular binding into those.