the side terminal was the original provision to bypass the ignition resistor while cranking, if you're using an internally resisted 12V coil instead of the ignition resistor you don't need to have the side terminal, if you have an ignition resistor you really should have the bypass provision

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics