Our coach also has a two channel monitor and I have thought about installing another camera on the right front corner of the coach since I almost ran over a little black car that was riding right beside of the door of the coach. Thank goodness for the little window in the lower part of the door or I would have pulled right over on top of it.
I almost got it, it really scared the crap out of me.
That is the only blind spot I have, the camera would eliminate that.
On the forum IRV2, there is a post where one of the members installed extra camera(s) and he put a detailed post about it some time ago.
His user is John_Canfield, do a search on "camera" and you will get quite a few posts listed, just search thru them.
Here is the link to his own web pageJust look at his listings for the side camera installation and click on it.