In desperation and determination, I whacked 'em into the holes with a hammer, and was finally able to attach the toilet paper holder. Goodbye gas station!
But I don't wanna do that with the other four. Before I can mount the towel bar, I gotta go back and buy smaller molly bolts.
Also, my back hurts worse today. Basically I can't sit or lie down without pain, and walking around doesn't help. I've gotta see the doctor again.