Accord CU2 2008 with Premium Sound System => Radio conversion

Hello, and have a good day to everyone…..^^ As the topic already suggests, I have to install a Clarion NX702E in my Accord… There are unfortunately only almost no “completely finished” adapters on sale for the car…. Problems are so far the pin assignments from the plugs and possibly also the Premium Soundsystem…… whereby I have already ordered (I think) an adapter from the USA…. (see link)http://www.autotoys.com/x/pr oduct.php?productid=12430 I took a few pictures here and hope someone can tell me what kind of connection is there or how the occupancy is there……. so that I can build the adapters myself^^ (because Honda “could/want” that so far not) With the picture of the OEM radio backside there are 5 plug-in sockets… 1. = antenna radio 2. = ? 3. = ? 4. = ? 5. = ? (seeming ignition/duration plus/mass/ etc.) Of this is determined a plug for the speaker supply line/pcs rom/ from the power amplifier in the trunk, steering wheel remote control, Parrot hands-free device, display in the cockpit, connections AUX/USB……. only what is what??? O.O. I also made pictures of the power amplifier connections….. Yes I know that the power amplifier is said to only work with the original radio, but why is there then this adapter (for aftermarket radios) in the USA???… I hope here can help me a few people who in most other F oren is much discussed about the problem but I didn’t really find much helpful….