That is it. No center drain in the photo. Water isn't supposed to end up in the center area where the wiper motor resides. Runoff from the slot under the passenger wiper post should fall directly in to that plastic drain that diverts to the left and right.

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- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread