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The contacts are built into the base where the bulb rotates in.
To remove the grill, you need to reach through with your fingers flat, and lift a little tab at the bottom edge on both sides, and then pull it forward to remove. There are screws under the grill to release the bumper cover. You also remove the screws from underneath, and from the fenderwell area, and then slide it straight forward off the bumper. This will give you access to the other bolts that hold the headlight in place.
do you have a picture of the LED bulb?
Also, know that putting an LED bulb into a system that has had standard halogens will change the amount of resistance in the circuit- so the lights may not work, or if they do work, may still set a fault in the cluster.