<VV> What Wire Does What?

[Western Canada CORSA]

Years ago I came across this website : http://www.newportwipers.com/opt.html
I"ve always wanted to install intermittent wipers on the RS, and thought it
would be cool if it could be done and still look stock.
 
This system seems to provide for that, but I called the company today and
was told I need to determine if the switch or the motor in the corvair setup
determines "park".
 
A two speed setup has four wires running to the motor and two to the washer
pump.
 
What is each wire responsible for?
 
Regards,
Joel