Hopefully doing a quarter chop in the near future, removing the stock bar with indicators for a rear bar so I need to got from tail lights like these

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To tail lights like these to incorporate the indicator

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Is there much messing around with the wiring in getting the indicator from the stock rear bar to the replacement tail lights and do the original brake and reverse wiring plug straight in to the new tail lights?

Just trying to get some hands on info so I can tick all the boxes before I start.

Cheers.