Ok I have a 1997 Range Rover with the Harmon and Kardon Premium system. Im building a new system for this **** thing and i ran into a little problem!!Ok on the back of the stock headunit i have 2 wire harness plugins. And i want to run the Alpine 9815 and i know aftermarket HU only have one wiring harness i think? Thats my problem idk what to do or what to buy. Im still gonna run the stock speakers and i know it has stock amplifiers so how would i do this. Please really need the help!!! Thanx in advance.