2011 X5 E70 Amp remote wire connection

[2011x5]

I cant find a simple answer where to tap the aftermarket remote wire. I have the remote wire running directly to the battery and have to disconnect it every night so it doesnt drain my battery.

Can some one tell me what color wire to tap into in the back where the stock amp is?

[bmw325]

Have you tried the Cigarettes lighter in the boot


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[2011x5]

hooked it up all good thanks. its the green wire btw if someone asks like me.