Uruk-hai are all over the Pelennor but this is the route I use for getting 10 for the daily.

When you go out the gate of Minas Tirith, look over at Osgiliath and aim for the tower that is in the middle. (It looks like it has wings.) There are 0-4 Uruks in each of these locations. The coordinates are the locations of the Uruks and then notes on how to get there.

1. 64.9, 14.5. As you get closer to the road and the orc camps, you’ll see a big flattish boulder on the other side of the road. Uruks are on the left side of this boulder.
2. 64.5, 14.2. Look down into the camp on the northeast side of the slight hill on which you’re standing. Go between the wagon and the tents to the “cage” on the other side of them. There is sometimes a troll at the wagon.
3. 64.1, 14.3. Turn north and go to the catapult, avoiding the trolls dancing by the bonfire. Uruks are by the the “tent” on the right.
4. 63.8, 14.2. Go between the catapult and tent up a slight hill then to the right. I sometimes have all my Uruks at this point.
5. 63.9, 13.3. Turn east and go toward the right side of the huge siege tower. Turn slightly left toward the tent that is down a slight slope. Uruks are around the fire.
6. 64.1, 13.1. Go southeast down the slope. Uruks are in the field.
7. 64.2, 13.2. Go into the field, pass two tents on the right and turn southwest. There are Uruks around the fire in front of you and around the tent on the left. This gets difficult as you have to go into the camp and there are a LOT of mobs here.

If you need more Uruks, there is another group in the cage north of you.

64.9, 14.5
64.5, 14.2
64.1, 14.3
63.8, 14.2
63.9, 13.3
64.1, 13.1
64.2, 13.2