1: This ctOS box is located inside a fenced perimeter on the upper floors of a building. There isn’t seem to be any nearby camera that can find it remotely so you have to drive a large truck, place it near the ledge to the east of the ctOS Breach map marker and climb the ledge to reach it.
The nearest box is located on the rooftop of the next building. Blow up the obstacle then hack it. The third one is located at ground level, between some construction materials. Just lift the forklift to reveal it and hack it remotely. The fourth one is located on top of a large rack beside the building. Blow up the wooden pallets, preferably while using a grenade launcher then hack the nearby camera to see the box. Finally, the last box is located under the bridge across the river. Just swim there until you get close enough to hack it remotely.
2: To find the first box, you have to climb the Rhodes train station and walk along the tracks until you’re in range to hack the ctOS box remotely. One of the nearby boxes can be hacked remotely by taking the west stairs of the Rhodes train station. The other box can be reached by riding a lift.
For the other two boxes, they’re located in the next factory compound. Take the catwalk between the two box markers in the map and look up to find one of the boxes above. For the last box, you have to take a high-rise lift nearby then climb to the pipe. Carefully walk on it until you get in range to the last box that you can hack remotely.
3: The first box is located way above the electric tower. Once the mission starts, head to the left and find the nearby lift there. Ride it to the roof and head towards the nearest ctOS Box. You should be able to hack it remotely. From there, don’t go to the next box yet. Cross the street to the east of that building to find another lift. Ride it and look up to find the high-rise camera installed. From there, you can use it to hack the other rooftop ctOS box.
Head to the fourth ctOS box and find a camera either beside it or across the street to hack it. Finally for the last ctOS box, head to the construction yard to the west of the last box and find the camera installed under the catwalk. Look above to the left to find and hack the ctOS box.
4: Head to marked location and find the first ctOS box behind the small room near the river. All of the boxes are located in the same area. The other three boxes can be easily accessed by switching controls on different cameras. The highest ctOS box can be reached by riding the construction lift nearby. You need to look at it and move around until you get into proper range and alignment to hack it.
5: To hack the first box, find the construction lift nearby then ride it up. Head to the nearest box and lower the nearby crane. Climb the container vans to reach the crane then lift it up again to get the ctOS box in range. Lower the crane and climb back down. Head to the next two boxes and use the cameras near them to view and hack them remotely. The last box is located inside a container van so you have to climb up and go around the middle of the container vans to locate the one that contains the ctOS box.