The two bits are from the battery cover I think. I Just put a new battery on my bike today and the cover that go’s over the battery has two bolts that bolt it down the two bits you have should go in the hole of the cover then the bolts acts like a washer.99.% sure that’s what they are. As look the same as what I just used today. Ps I have a DNA outer filter and a K&N Iner filter