Re: Steering wheel Column Accessory switch
Agreed, you should be able to turn the key "backwards" for "ACC" position. Try carefully working the switch back and forth gently. It may just need to be exercised. If no-go, don't force it and it looks like you may be reinstalling the key tumbler assembly.
If the key physically does turn backwards, but you have no power to accessories, then the switch itself on top of the column (under the dash) needs adjustment.
Do not use the "on/run" position to run accessories. Even if you do not have "points" ignition, you waste a lot of current and can overheat devices because of all the ignition controlled circuits will power when you do this.
-If you don't stand for something, you'll fall for anything.