Grounding wire missing from Ring Floodlight

I recently put some new siding up on my house and had to remove my Ring Floodlight. When doing so, I somehow removed the grounding wire that originates from inside the flood light camera. I no longer have that wire. The grounding wire from the junction box still exists.Is it possible to put a new grounding cable into my flood light camera? If so, how do I do that?I attached a picture as a reference where I assume the grounding wire should reside.