Installing questions Metra kit 99-3010S

[Bingel]

Hi everybody,

Could somebodyy give me advice on installing the Metra kit?
We have a 2012 camaro coupé 2ss (since yesterday )with boston 9 speaker system.

I have the following questions:

16 pin harness
• Question 1 : The left front and right front speakers are to be connected. Will the center speaker work with this solution?

Note: From this harness, the rear speakers are not used.

44 way harness
• Question 2: There is an amplified or non-amplified connection. The new radio has both options. Which option is currently used in the Boston acoustic sound system? Or is front and rear different?

Note: The Metra kit has 2 options which can be used. Amplified and non-amplified.

• Question 3: Do you recommend the amplified or non-amplified if both systems can be used?

• Question 4: The subwoofer at the rear is amplified (I saw this on browsing the forum), will the signals from the rear speakers be used as input signal for the woofer?

• Question 5: In Europe (The Netherlands), I believe there is no Onstar system. What should I do with that?

• Question 6: Is it possible to use the stock microphone for use on the new radio?

So party the wiring is soldered, but I'm stuck at the moment.
The soldering iron is stil hot Any suggestions ?

Stephan