The blower is just above the motor. You can see the long belt going from the blower to the motor. Over on the other side is part of the variable sheave pulley which was the speed changer mechanism. A little motor wound up a chain to pull one arm of the mechanism up which increased the drum speed from the wash tumble speed to the rip-roaring spin speed of something like 225 rpm. Big heavy belts ran that thing and they made a lot of noise.The heated air entered the rear of the drum on the left, as you looked at the machine from the front, was pulled across to the right front where it was sucked out through the front of the drum then through the lint screen and then out through the blower.
It was quite a noisy machine. Mine had belonged to a friend's family. When it was in use (and usually in the dry cycle) when the father, a police detective, arrived home from work, the mother just opened the door to stop it so that he would not be bothered by the noise. There were fat heating elements glowing cherry red that could be seen through the window during the dry cycle and all air flow across them stopped and 5600 watts of heat just baked the upper part of the machine. There was a little damper on top of the heater box (the rectangular gray box seen behind the pulley) that was supposed to restrict air flow through the machine until the start of dry. The poor little thing and its spring were just rusty toast after all of those years of abuse.
A service man told me that when Sears took these back due to customer non-satisfaction, they used to take ice picks and poke holes in the outer tub so that they could never be used again. He told me that when he saw my epoxy and glass tub repairs.