Anybody know what these parts are?

[Sacirema]

I just finished changing my radiator, water pump, and thermostat. After everything was put back together, as I was draining my catch pan, I saw these two little o-rings in the bottom of the pan of coolant. I can’t recall any part that had these rings on them, so I’m not sure where they came from, but I’m worried they fell off of something important.

I’m a newbie to the 200, but I was hoping someone here might have an answer. Any ideas?

 

[sdnative]

Transmission cooler line o-rings from the hard line fittings on the bottom of the radiator. The new radiator should already have these fittings installed.

 

[Sacirema]

Ah, that’s it. Thank you!