The L shaped thingy is what th bonnet catch and lock assembly is attatched to. Open your bonet and have a look. You'll see what we mean by the L shaped thingy. it has 2 bots at the top and one on the botton and hs the horns attatched to them.
And no, no issued with fitment of the GTR bonnet around the GTS headlight nd indicators.
Just double check to see if you have two clip holes on the inner ide of each headlight. If you do, thts where the GTR grill clips in, if you dont its no big usse, it clips into another hole as well