Looks like someone was in there before and tossed the caps, the caps are to assist in channelling all draining oil/ATF back into the pan and not get pooled in other spots - The 722.6 case is interestingly designed too - it has a spiral lip cast into it that allows smoother oil drain to the pan.

I would suggest you test the ATF for glycol or water damage and the contact pins for any signs of tarnishing. Your car may have the factory defected valeo branded radiator in it.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)