Quick audio question

So do i :)

speaker cable has two wires, one solid co,our the other with a black line.

Which hole on the ISO block should i plug which wire into? My diagram has RF1 and RF 2 etc.
 
Generally a black line means a negative feed but with car manufaturers it could be the opposite.

So, with that in mind, find out which is negative/positive for each channel on the ISO block and you're sorted.
 
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