I need tο know whісh side іѕ thе negative аnԁ whісh іѕ positive ѕο I саn install mу banana plugs. I wаѕ tοƖԁ frοm best Bυу thе side wіth thе writing іѕ negative bυt thе service rep didn’t seem really sure. I hаνе nice speakers аnԁ need tο know fοr sure please hеƖр thank уου.

Both wires are identical.
The markings are so you can hook the Negative jack on the back of the receiver to the Negative jack on the back of the speaker.
You just have to be consistent and you will be fine.
Hi.If you look closely, the insulation will be a different shape or thickness.( but the wire inside is the same) If it is then connect both ends of one shape to the positive connectors of you Amp.and Speakers. and both ends of the other shape to the negative connectors of you Amp. and Speakers (usually red =positive and black = negative.) If you only have writing on one side then use that as positive or negative.
Um, neither side is negative, it’s just dumb wire.
Just pick a scheme and stick to it. Red connector, white writing, red connector; black connector, clear wiring, black connector, or vice versa.