Maytag MDE9806AYW dryer cord swap

Model Number: MDE9806AYW
Brand: Other
Age: 6-10 years

Hello, looking for some help with swapping my Maytag dryer back to three prong setup from four prong. I did the other swap a few years ago, so don't remember the exact setup and haven't been able to find any photos or other info for this model. I took the lower white wire off the center post and attached it to the chasis ground. I was pretty sure this was correct, but the dryer doesn't work like this. I've tested the wires coming into the dryer and the two outer wires are hot. I'd appreciate any help!

https://photos.app.goo.gl/nabVnyTggTLzwbEN6 Attachment 1149