Retrofit AUX input installation problem

[NeaMarin]

Hi all.
I have a 2004 X5 4.4i, without nav, with Professional Radio/CD. I bought today the retrofit kit for the auxiliary input, i did everything the way i was supposed to, i even broke the bezel around the AC/Heater control unit, and i`m stuck at the end, with plugging the wires into the existing 12 pin plug. Problem is, they say in the instructions, and even here on the website, that the three wires one white/brown, one white/blue and one yellow, well, instead of the yellow, i have a white/red. Anyway, they say that i`m supposed to plug them in plugs 3, 4 and 10. Well, 3 and 4 are busy at the moment, having other wires plugged into them, the 10 is available. Question is, what the heck do i do, since i can`t plug them where they tell me to ? I only have this one plug back there, in case you think i didn`t look.

Please help and... Thanks for listenng