It's the hour meter that goes in the hole on the right. The left opening is actually empty on my dozer. Later 310 dozers got rid of that far left opening altogether, so maybe we're supposed to have an empty opening there. Those 3 small holes in the center should be (top to bottom) the key switch (one notch switch which turns on the electric fuel pump, starter push switch, and light switch. The hole on the far right (where you have a wire hanging from) is the choke push/pull.