First, I want to thank jjdicecco for the great advice. The step "3 - tighten the three bolts that mount the motor to the frame" successfully resolved the issue I had been experiencing with creaking noises coming from the bottom of the frame under load on the pedals. Additionally, I've also been dealing with a creaking noise coming from the battery cover panel. To address this, I used vinyl tape to cover the inside lip/tongue of the panel that touches the inside of the frame. I also applied vinyl tape to the two-prong metal locking mechanism that slides up and down on the inside of the battery cover panel, which contacts the frame. As an added precaution, I used high-heat felt tape (Green Egg) on both the left and right sides of the battery compartment (bike frame), which seems to add some rigidity as the battery fits snugly from all sides.
The post from jjdicecco is located here... https://electricbike.com/forum//foru...ring/page38
The post from jjdicecco is located here... https://electricbike.com/forum//foru...ring/page38