gamespro

Best answer as chosen by Asker / Ratings
It depends on what difficulty you are on but the control units are usually in these locations.
On the wall above the doorway behind you.
There are two of them on the stairs just in front of you.
There is one on the cylinder in front of the stairs.
There is one near the stairs on the other side of the bridge on the right side.
If you go down the stairs in front of you and look between the railing on the right and left you will see a control unit on the walls but it depends on what difficulty you are doing.
There is another behind the flag on the left side.
There is one on the wall to the left of th doorway on the other side of the bridge.
There is one on the right side under the birds.
There is one attached to the cypher in the air above the building on the other side.
If you are doing it on the harder difficulties there will be one on th bottom of the brige, so stand on the right of the area you start in and use FPS then press L2 and R2 to get higher and look down.
Those are all the locations.