Hi, So bed is finished and now it is onto fenders, running-boards and rear splash guard. There seems to be little info on the splash guards. Is there a correct order to put these together and how do the splash guards go in? WHat do they bolt to? In opening the boxes yesterday, the running boards the previous owner bought are fiberglass so not sure if that complicates or makes easier. There are no holes in the bed so any advice on how to line up the fender will be helpful. thanks, Nils