How do i change the starter motor on my zafira diesel?

how do i replace the starter motor on a vauxhall zafira?

I have removed all the nuts however, a steel bar is preventing me from removing the unit.

How do I get at the Nut behind the plastic cable channeling to release the bar and then the starter motor?

Anyone who has experience, video, pictures, et al would be most appreciated. And any technical detail