There is a fairly good description in section 10 -- Fenders and Sheet Metal of the Service Manual. Basically in addition to the radiator top splasher there are screws on each side from the inside of fender under the headlights and one on the outside under the side chrome pieces. A pair of brackets or support bars between the radiator cradle and grill is also used toward the bottom of grille.
On that outside screw under the fender side trim, depending on how the fenders are set to do the hood gap there may be a space between the tab on the grill and the fender sheetmetal... Do not try and snug that screw down to bend the tab if there is much space. Place a washer or shim or something to fill the space before tightening the screw or you stand a good chance of breaking the grille tab off. The side chrome end slides in under the grille corner so you may need to sort of finagle the grill side to side and get a test fit for the side chrome to figure any shims out before tightening the attaching bolts.