MrSUT

Need a little help here in id'ing this part. After pulling the engine, I pushed the runner into the driveway to pressure wash the engine bay / undercarriage. Low and behold I found this part underneath laying on the ground afterward. On the other side it has three tabs equally spaced. Is this a floor drain cover? For the life of me I cannot locate where it belongs. Sorry for the grainy pic - had to reduce in order to met spec's for loading.

Thanks in advance for your help!