What's the correct orientation for Pico W when using PiCowbell ...

[sealyon]

The assembly instructions for the PiCowbell don't show images of the soldering configurations with the correct boards (most are showing assembly with the PiProto board not the PiCowbell). And I can't seem to find mention or images showing exactly how the 2 should be connected (when using stacking headers). I've installed the stacking headers to the PiCowbell and will have the Pico W on top. Should the Pico be oriented so the USB fits over the I2C connector on the PiCowbell (with the wifi module on the Pico W over the MicroSD holder on the PiCowbell)?

[adafruit_support_carter]

That sounds generally correct. There's an image here showing the SD card on the opposite end of the Pico's USB:
https://learn.adafruit.com/adafruit-pic ... r-for-pico

It's not a Pico W shown in the photo, but it's the same general orientation.

Another easy way to double check is via the pin labels. For example, the various power pins are here:

pins.png (267.57 KiB) Viewed 40 times

which correspond to these pins on the Pico W:

pins2.png (262.4 KiB) Viewed 40 times