Disconnect the 12v to the stop solenoid.. err coil??? and put one lead on the battery post and the other on the stud on the starter. Have a friend crank the motor over and get your reading. You want to see less then 0.5V. The reading you are getting is how many volts are being converted to heat due to resistance in the wires.
The proceedure for the ground is the same.
You can use this method to pinpoint exactly where the problem is, a connection, the wire or other. Just put the leads on either side of the piece you want to test. Ex to test the connection around the battery post put one lead on the post and the other on the clamp around it.