Good to hear you have the bike back.
I found a picture of the exposed spider bus on Facebook (not my bike fortunately
)
It looks really intricate and I can imagine that it is not an easy job to replace it all
I can't really tell is the spiders bus is all the components in the picture or just a subset.
From what I can remember from the charge tank installation I seem to remember that the charge tank attaches to the 2 silver studs right in the center of the battery that are now empty (below the black disc with the blue smiley face sticker). I guess that is also the spot where the leads of the Powertank would go.
At the top I guess it is the contractor (with the black round disc on top)
Top right would be either the fuse or the current sensor or both
The current sensor could also be the blue bar on the top left with the white sticker on it (sensor wires on both sides of the blue bar)
From the charge tank install I also seem to remember that the wires coming from the chargers on top of the battery to this spider bus are not really covered from water entering the spider bus area other than only the tank and a cover plate to the rear of the spider bus.
I also remember wondering why the water trap outlet on the bottom of the charging port had no drain hose attached to it and it was kind of directly over the orange wires going into the spider bus area.
The spider bus looks pretty waterproofed but rain here in Europe can be really heavy. I keep thinking whether water running down the tank would be able to enter the charge port connector and then go via the charge connector drain port and drip directly down into the spider bus area.