Of just oil dripping down the bellhousing?
I got the same oil leak...
I know for fact that my turbo oil supply line isn't in tight enough and is probably leaking a wee bit. But I have to drain the oil to be able to take that line off and tighten it up. If I recall I need a 21mm deep socket.
I usually have wet residual oil on the bottom of the bellhousing right behind the oil drain plug. Sometimes on the bottom of the trans.