Hello, I'm hoping for assistance. I recently installed the Amcrest IP2M-853EW for a friend. The specs say the camera allows 2-way audio and there are audio in, audio out, and ground cables on the cam, which my friend wants to utilize. Only problem is they are open wires with rca or other head on them. I asked Amcrest costumer service what they'd recommend I do to make this work and all they gave me was a "do not" list so as not to void the warranty. I'm hoping to find any viable suggestions. Any and all help is greatly appreciated. Thank you.