Patrick has a couple on his website under Kit Car shows..
http://www.msportster.co.uk/data/st07-089.jpg
http://www.msportster.co.uk/data/st07-039.jpg
http://www.msportster.co.uk/data/st07-040.jpg
Not sure if these are Marlin supplied?
I guess the angle is to keep as much covered as possible.
I expect you have to cut your own roll bar holes to suit.
I've got some pictures of another car but it has the zip straight down the middle so suspect it's not a Marlin one.
...peter