I have revised this posting on the off chance that someone else in the future is interested in what I discovered.
TL;DR: I plannned to use an AX159060 wiper motor in an automotive project, but found that the "park" switch appears to be normally open, not the typical normally closed. The (AE)159300 motor is nearly identical to the AX159060 motor, but the park is of the typical normally closed style.
Background: I originally planned to use an AX159060 wiper motor in my project to modernize the windshield wipers on a 1970s Datsun. It appeared to be a convenient form factor, and was relatively common. However, in my testing, I found that the parking feature worked unusually and decided that a different motor would suit my needs better. The motor I decided to replace it with was an (AE)159300 whose internal switching is arranged better for my application. In my searching, I found a schematic for both the AX159060 and (AE)159300 motors which I have attached below for anyone interested.
AX159060 used in 2008-2015 Cadillac CTS and 2007-2010 GM trucks. My motor followed the "W/O DENSO" path and never connected Pin 3 and Pin 5 under any circumstance. Schematic: https://www.silveradosierra.com/electrical/2010-1500-windshield-wiper-motor-wiring-t239857.html
(AE)159300 used in 2006-2018 Toyota RAV4, 2008-2014 Subaru Impreza, and MANY more. Schematic Page 186: https://frankensteinmotorworks.com/2GRFE/diagrams/Toyota%20RAV4%20Electrical%20Wiring%20Diagrams%20%28EWD%29.pdf
These two wiper motors appear to share a common manufacturer, however I have no proof of this. My hunch is that Toyota makes these motors and then sells them to other companies with unique part numbers according to the application.
I find the Toyota wiper motor to be a convenient form factor, and seems like an ideal choice for design projects or to upgrade from a NLA part.