the electric wipers in my 58 are oem to the best of my knowledge and had the rotary cable like orrieg posted
when i shaved my dash i lost the spot for the switch, i used a vent cable to operate the wipers
orrieg's pic of the rotary cable switch
and my straight cable actuator to the left of my speedo
out is off, a little in is low, in is high; high and low are relative... even high is a little slow by todays standards
