Are you sure that its an XL? The XL, or XR-L came with turn signals, and even if someone had removed them, the wiring would still be there. I'm thinking it must be an XR-R, which only had head and tail light. It didn't even have a battery, just a capacitor to smooth out current flow to the lights, as at idle the magneto didn't put out enough juice to keep the lights burning brightly, they would just dim. It did have a 12V electrical system, though. They are several kits available to put lights on an XR. It seems to be a common modification, though, so check out www. thumpertalk.com, there are many there that have done it.
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