FLX trail schematic

I need a FLX trail Gen 3 schematic. FLX says they don't have one. I'm troubleshooting an error 21.
I hope you can find one. I've seen that question posted many times, for dozens of brands, since 2014 and I have yet to see anyone successfully find an official electric/electronic schematic for any ebike. The best I've seen is from users and enthusiastic DIY'ers. You might get some help if you post a thread: 'help with error 21'. No guarantees there either. Best of luck.
 
Does anyone know what wire this is? Fixing a busted / stolen F1 trail that had the battery stolen. It's not the main wire that runs to the controls. It comes out of the hole on the underside of the frame in front of the motor. 🤷‍♀️

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Sadly not the speed sensor... more pics..

Second pic is the one that has been severed.

Thanks
 

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Sorry it’s been a while since I had a gen 1. The light module is the only thing in that section of the downtube. Fire the bike up and see if that’s hot when the lights are turned on.
 
Sorry it’s been a while since I had a gen 1. The light module is the only thing in that section of the downtube. Fire the bike up and see if that’s hot when the lights are turned on.
There’s a number of folks with G1’s on the Facebook group “ride FLX”
 
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