See http://www.squarewheels.org.uk/rly/stock/1996tubeStock/96cabIntLongSotM.jpg for a picture of the monitor in the cab, below the window.
Thanks. That link doesn't work, but I found the cab pictures on the site, thats an interesting site.
You may need to click the link and copy the link out of your browser, and back in a new tab.