I have a F2880e that i have had a hard time hooking up the l2162 rotary broom. I can do the tongue no problem but there is 2 metal spacers that install on the arms and they are different sizes and for the life of me i can figure out what side goes where. One is about 1 or 2 inches bigger than the other and it doesnt clear snow like i know it should and ive looked high and low for a manuel or how to with no mentioning of these 2 mystery spacers or where there home is.