Hello guys! I'm new here so consider me a rookie and treat me accordingly

. Yesterday managed to do the regular maintenance of my beemer, as for some time i am the only one having regular contacts with it

, yes, cause of the big love there is between us. Maintenance consisted in oil change, filters change and now i've done a differential oil change aswell. So far so good, car runs beautiful but... i've noticed oil leakage beneath the transmission oil pan.
Inspected with the lamp and the oil doesn't seem to come from the pan gasket, neither the draining bolt but from somewhere up, where the shifter lever gets into the transmission.
Now i didn't had the idea yesterday to unscrew the filling bolt to check the oil level with my finger as it's clear that the leakage is quite important but maybe some of these days after i get proper transmission oil (just in case) i would definitely do.
Is there a reason to be worried? Anyone has any idea?
Here are some pics: