I am completely confused on the Aprilaire wiring schematic. The himidistat itself needs 24V AC which I can get from the transformer on the switch-box housing mounted to the furnace. If the Honeywell fan board on my new Heil furnace has the "EAC" and "HUM" accessory terminals (which are on the 115V AC side of the internal transformer), how do I connect the 2 leads that run from the humidifier to the humidistat?? The humidifier itself has a grounded 115V AC plug for the fan and also has a transfomer itself inside.

Aprilaire 700 humidifier wiring

Aprilaire 700 Humidistat wiring