[SLK R171] I need to install the Satellite Anti Teft system

[Cixi]

Hello.
I need in the next days to install the Anti Teft Satellite Tracking Allarm System in my car since I'm obliged to.

I will place the box and the two antenna (Sat and GSM Phone) down under the foot box of the passenger seat.

But I need help.

I need to find 3 cable.
1 Positive alway On
1 Positive On when the car is running
1 Negative

Can you please tell me where to find these three cables please?
I'll enclose some pictures.

Thank You All

 

[Cixi]

Here is where I want to place the main unit (a box)

http://imgcash4.imageshack.us/img156/8918/030120081149cx2.jpg

Can you tell me where to take the power please?

 

[DansSlk]

Switched power you can take from the interior 12V socket (there are neater ways to make the connection but for pure simplicity thats a good location).

For ground (negative) I'd advise getting another ground lug and installing it at the grounding point located on the floor by the audio gateway but those brown wires going to the ground point can be used if you want.

For unswitched you have the feed to the audio gateway that you can use, its the big red wire connecting to the unit in the right hand side of the pic but again this is the simplest way of doing it not the neatest.