Porta one striped wire-positive or negative?

audioed

New member
Hi all,

New to the boards here. I have just dusted off my Porta One and I am trying to take care of a few bugs and start using it again. I just over zealously desoldered the two wires that connect to the circuit board in the AC adaptor with the intention of resoldering them once I clipped the wire back past the broken point. Well I forgot to note which one was conected where. My question is, which is positive, the stripe or solid?
 
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