Motorola phone, Navi with pocket PC ---Questions

Good afternoon, Lords of the Rings,

I have had an A8 (94) for a few days and there are of course a lot of new things and questions.
Many things I could already learn from the contributions here, or, have already emailed someone directly, Thank you for the helpfulness.
However, I have not found anything on the following two points.
Motorola phone: Such a device is built in original. In the trunk is a device into which one probably inserts the SIM card. But the required size seems to have check card format. My SIM-C. is much smaller than all the others I know.
The Bosch man told me by phone that you could insert the small card in the receiver (so on the center console, but I didn't find anything here.
If there is a small SIM-C slot, the slot is hidden. How can I activate the device?

Navi with Pocket PC: I want my Pocket PC (Compaq similar. ALDI system) but I haven't found a clever place yet. I don't want that thing in front of the windshield, it should be anywhere in the dashboard area. Has anyone ever integrated such a system in their car and could possibly give me some clues with a picture?

Thanks to all the helpers

Georg