Where could this leak possibly be coming from?

This is my Front diff. I noticed this big leak Maybe 5ish months ago. Couldn’t come to a conclusion at the time and I cleaned it off. Last week check again and it’s back to looking like how it was. Has anyone experienced this type of leak before? It seems to be leaking from the top somewhere. Could it be power steering related? 2009 Infiniti g37x sedan.