The above manual has been reprinted and is again available: http://www.crbmw.com/rokcart
The Electrics manual is $30. This manual is the best electrics manual for Airheads. Oak was primarily responsible for the manual. This manual is highly recommended by me, Snowbum.
My comments below are applicable to my copy which is dated 1993 on the front cover; and maybe to yours, if the manual is the same inside. Do let me know if your manual is not the same as mine ….when comparing my pages and notes, below.