You are correct. Heating element is in a heater box on the bottom beneath the drum. There's a duct that leads to the right side of the drum.
By the way, there's a manual-resettable overheat safety stat on front of the heater box. Red button.
Motor is in the back on the right side.
As for the creaking, have you leveled it properly? If not, do so and see if that helps the noise. Mechanical tolerances are kind of tight for the drum rotation, you need to be sure the cabinet is level and true-to-square.
If you want to see the drum rotation, either trick the lid latch, or raise the top deck so you can see it with the lid closed/latched. Remove the two lid bumpers, pull the screws to raise the top. BE CAREFUL if running it with the drum exposed!
After raising the top, there are two screws to remove the front panel. Pull the screws, then it pulls up and off (fits into slots at the bottom). There's a ground wire attached to the lower edge of the front panel.