No worries at all. Happy to help.
You need to remove the plastic tab where the red arrow points. I just used flush cuts here and slowly nibbled it away. Finished flush with some sand paper. Note that tab is actually the bottom of the trim piece.
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On the drivers side. You need to remove material from the area that extends backwards towards the engine. When you go to test fit you'll see where that side hits the winch bracket. On the TOP face you'll trim back the material to where the scalloped piece curves back towards the motor. Then you'll trim the vertical part until you're able to seat the trim fully. Note that there are two holes on each side of the center piece that the left and right trim pieces (that cover the tow hooks) snap into.
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With the winch installed you'll be able to use one of the flat top fasteners in a hole on the bottom on the trim (furthest passenger side hole. On the upper part you'll be able to use three of the "button" style fasteners. Again starting from the passenger side. You'll want to remove the left and right side trim pieces before you start. Then reinstall when you've got the center trimmed out and sitting how you like it. When you have everything in hand it'll make sense how the three pieces interface.
Go slowly. Fast is the enemy, and dremel tools are the devil. Hope this helps a bit.