So basically I've come up with two ideas of how you are connected to the implants in your morph:
1. They are connected to your nerve system, you use them the same way you use your limbs, fingers etc. now.
2. They are wireless connected to your Basic Mesh Insert.
To clarify about the origin of the questions: It's not about how you actually use them but more about the fact, that in the second case Implants could be hacked, deactivated or even used against it's owner.
Also is the method used the same for every implant? If you ask me about some "Enhanced Vision" Implant I'd go for the first answer but how about a wrist mounted tool?