Ecu box removal

Hi I have a Audi A4 b7 saloon I’m trying to remove my wiper linkage but can’t seem to get it out. Looks like I have to take the ecu box top and bottom out does any one have a clue how to do this. I have taken the top screws plus the bottom nuts off the box. There are wires going through the bottom half of the box that have three connection can I just unplug these or does the battery have to be disconnected any help would be great many thanks


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