What do the six buddhas in The Wheel of Karma refer to?

Is the Buddha's finger at the top left of the picture? In the direction, we can see that there are two paragraphs. The content of the text is:

You should try to get rid of this law.

Being diligent in Buddhism often means not letting go.

Surrender to the army of life and death can exhaust the sea of troubles.

If an elephant destroys a hut, it should be on the verge of pain.

Some versions of the wheel chart of life and death draw poems at the bottom of the chart, which is an incorrect drawing method.

Wen Shu's first two sentences, that is, "You should seek separation in this law", teach us to see clearly that the six paths are bitter and have the desire to separate. The third and fourth sentences, that is, "Buddhists practice hard and often don't let go", are the ways and methods to get rid of the six sufferings.

To get rid of the six endless cycles of life and death, we must cut off the pain from the root. The source of suffering and reincarnation is trouble and karma, and the most fundamental reason between them is trouble. Among all kinds of troubles, greed, jealousy and delusion are the main ones. Among the three, it is rooted in delusion. In all kinds of ignorance, self-persistence is the most critical reason for reincarnation and pain. Therefore, as long as we can break the ego, we can cut off the endless running of troubles, karma, life and death and reincarnation, and fundamentally cut off this terrible and helpless process. How can I break my grip? First of all, we must enter the teaching method inspired by the Buddha. This is not because the Buddha forced us to obey his orders like a totalitarian tyrant. A long time ago, the Buddha was an ordinary person, wandering in samsara like us. This ordinary person, huh? A certain method of practice finally broke away from the cycle of suffering and the six divisions in the wheel of karma, and also taught other sentient beings ways to get rid of suffering. The Buddha didn't force us to follow his teaching method. He just said, "I've been there before. I have experienced what you are experiencing. Later, I got rid of the pain. Here's my way to get rid of suffering … if you want to get rid of suffering, just do it? Just go the same way! There are many teachings of the Buddha, so we describe them as "84,000" in Buddhist terms. Among the 84,000 methods, the six methods of getting rid of karma can be summarized as three kinds of learning, namely, abstinence from learning, determination to learn, and wisdom to learn.

-"The Wheel of Life and Death-Six Divisions in the Wheel of Karma"