Somewhere, I have a fairly comprehensive uniform guide to the German Jaeger. Alas, my wife has a passion, dare I say mania, for moving the furniture incuding my bookshelves around so it may take a week or more to find the damn thing.
If my memory serves, then the cap band for the officer's peaked cap should be green along with the piping on the crown. Cockades depend on the state identity of the regiment, Prussian, Bavarian Saxon etc.
Senior NCO's would be distinguished by 'tressen' a strip of lace running around the front and bottom of the collar, usually metallic but in the case of Bavaria in the blue/white cheequerboard IIRC.