Klopt helemaal, hier een stukje van Gamespot voor het geval dat.
Your main goal here is to assemble ten mines for the operation in Kinshasa. This isn't necessarily all that difficult, though. You can find the mine-assembly device near the door to Emile's security area.
To use it, simply walk up to it and access the computer screen. There are only two controls involved here; on the 360, they'll be your right trigger and the left analog stick. The right trigger will cause the detonators to descend into the mine itself, while the left analog stick will orient the detonator so that it heads into the core of the mine. If you descend too quickly, you'll likely have a hard time controlling the detonator's movement and crack it on the side of the mine. If you descend too slowly, you'll have a hard time lining up the detonator with the center of the mine (since the slower it moves, the less control you'll have over it).
The trick, if there can be said to be one, is to go not too fast but not too slow. This is more of a touch game than anything else. We found it best to adjust our aim using the diagram in the upper-right corner of the screen to guide us, but also keeping an eye on the height of the detonator on the right. If you're in the green zone when you're just above the sweet spot, you can hit the plunger and send the detonator where it needs to be in one swift stroke.
You have fifteen detonators to work with and need to construct ten mines, so you have some leeway here. It's best to save your game before you attempt this mini-game and give it some practice before trying it for real; doing so will save you time when you actually get good at it, and you'll probably need all the minutes you can get here.