first take off the side panel or pull it out at the front mount point, then remove the thank shroud.
on the back at the top towards the middle is a small loop molded to the shroud. this slides over the little metal tab on the gas tank. (like you said)
next pop in the rear part by the seat where the panel meets by the seat. there is a rubber grommet with two grooves. the upper is for the shroud the lower groove is for the side panel.
the blue is my tank shroud popped onto the grommet, then snap the side panel on after wards into that lower groove.
put screw in top side of shroud through the tank, where the seat covers up when on.
next make sure the two tabs on the shroud pop over and in front of the bracket like this:
next take that front plastic shield and make sure the bottom fits over that rubber grommet like this:
then push the panel up and inside the shroud and install bolts:
hope this helps some for ya