Problem with wiring cooktop

[azcanuck1971]

I'm replacing a cooktop that is coming in tomorrow. I've done basic electrical work such as wiring ceiling fans, replacing outlets and switches. However I'm stumped looking at this box under counter with old cooktop. All the wires are black! I'm not concerned about the aluminum. Just concerned there are no color coded wires. Even from the cooktop. I would have just copied color from cooktop to connect. Now, I have zero clue to figure out what wire is what.

 

[Megawatt]

I hate to tell you this but that wire is older than I am. Also aluminum and copper don’t mix and the one wire I can guarantee is the one without insulation is your neutral other I would completely take all the wires loose and please call an electrician because this is over your head, no harm intended but you are a DIY and someone with experience needs to figure that out for you