Is this to get cables in a window??? A tried and true method is to get a piece of plexiglass, the width of your window and couple of inches tall...open the window, put the plexi between the bottom of the window and the window frame, close the window down on it, put weathestripping or even tape on the edges, and off you go. Drill holes in the plexi all day long for as many cables as you need.
I use this method right at the window at my desk, shack and except for the coldest of days, I never really know the thing is there..