Oil leak front right driver side of car.

What is your question?

Their is a slow/small leak coming from under the alternator on the driver side of the car. It looks like their is a small piece of metal tubing coming out bent towards the wheel well and then goes towards the rear of the car. I checked the oil a week ago and it was tip top full, now it is half full. Any ideas? I can't see to well as I have not taken the alternator off. I'm thinking it may be a seal of some sort.