Checked both my e3dv6 and my lite6 fans/mounts. The rear of the fan that is visible while its installed is exposed/frameless and the frame/wire side of the fan is mounted facing inward toward the heat sink fins and not visible when installed (Same as e3dv6 pictures on manufactures site). When in doubt unscrew, flip, and reinstall? Hope this helps.

I saw the setup of the duet wifi I bought as being due to the number of cnc machines/robots its able to control. Its not a plug and play solution. I found it to be well worth the required effort, but effort is required.
The EASY WAY I used while learning was the reprap firmware configurator https://configurator.reprapfirmware.org/ and even though you have to build an entire FW zip every time you can unzip and choose piece by piece of g code to use, or just upload it completely. The WIFI setup portion of the configurator would solve your issue.

Thanks for the solution dc42. Moving forward again now. Thanks raykholo for the reprap post (good info), and the x-y axis correction indeed.
Ive got some pictures but its already in pieces now. As far as cubepro stock internals, most of what I know are hot end/steeper specs but I did use an e3dv6 hot end while "stock". Stepper motors are motion control m42sth47-1684sc-s (fl42sth47-1684a-01 new version?). The TCO ("Thermal cut-off"-white square wired in series with the heater element) is a 145c 2a h145, I used a panasonic eyp2bh145 in replacement. The thermistor is 230k (resting at 209.2k at 72 deg), I used TE Connectivity 231k digikey pn 223-1180-ND (TE pn GC2315R-3-200) witch required drilling of the e3dv6 thermistor hole as the 231k bead was slightly larger. The e3dv6 heater I used was a 24v 30w wired with the TCO in series. That is about all I have but I hope its useful.

I have a cubepro I'm converting with a Duet WiFi that has 2 motors on the X axis and I'm wondering how to wire them. The motion control motors installed are nema 17, 1.8 deg, Voltage: 2.8V, Current (phase): 1.68A. Wiring both in series on the X axis driver (current draw?). External X axis drivers needed? Optionally wire them in series as the Z motors shown in Duet WiFi wiring diagrams "option B" but I'd have to manually edit the g-code Z-X axis of every file I print. Is there a way to edit what axis is what driver in the board settings/firmware? Solutions welcomed.