400E Transmission Removal

[8092400e]

Hello All,

I have a '92 400E, transmission is unbolted, rear engine mount off, exhaust off, front 1/2 driveshaft out and its ready to go. The question is, does anyone know what connections I might be missing before I pull it back? Here is what I found:
Shift Linkage - Done
2 pin connector, drivers side - done
Drivers side vacuum line - done
Drivers side, Top (looks like a rpm sending unit) - done
Transmission cooler lines - done
Dipstick tube - Still wrestling with the 5mm allen bolt on the back of the engine.

Passenger side there is a large white plastic unit pressed into the tranny, not sure how to remove it, looks connected to a harness/vacuum lines that goes toward the firewall.

The wiring harness is crispy as are most of this year so I don't want to damage anything further in the process by pulling things tight.

Thanks in advance!