The screws under the cowl are short sheetmetal screws with a "M" on the socket head. The outer clip holes are right above the top door hinge bolt, it may be hidden by the end of the widow rubber coming from the roof line. These outer clips use the same screws. they can be installed in place but be careful of bending your stainless or scratching the paint. I have installed them after the stainless is in place with a pair of needle nose vicegrips, be sure to make sure the clip lands all the way into the trim before screwing them down. Another set of hands and eyes would be helpful.
Victor