When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
That looks really dark and odd. I would think the the box center height, slightly left to avoid the mirror would give you a good result. Try it out and view in Live View to see what you are getting before heading out.
Thanks, good advice will give it a try when it's back out of the trailer which could be a while at the moment