Cheers, is it possible to purchase a 'standard' to FAKRA adaptor if I find that whatever I order isn't FAKRA?

Just taken a good look at the set up in my boot. First question, how is the carpeted panel that covers the BM24 unit actually removed? I was able to access everything by removing the nuts at the rear of the panel and gently bending it upwards but something is holding it down at the front. Surely I don't need to remove the rear seats to get this panel out?

Anyway, I was able to unplug the connector from the back of my BM24 and plug it into my new CD head unit and it all worked fine (except for it had no radio reception of course!). I'm feeling confident about doing this now. One thing I did note was that I had plugs for both of the inputs under the main connection. One I was expecting as i have a CD changer. Is the other one related to the nav? It had blue and yellow wires going into it but I couldn't trace where they went.