1965 Dart Blower motor wiring

I have a 65 Dart and I am replacing the broken heater blower motor. When I removed the heater box I noticed that some wiring was hanging loose. I thought I could figure it out as I had a wiring diagram http://www.mymopar.com/downloads/1965/65DartA.jpg for the car.

My problem is the diagram shows the wiring to the switch and resistor but NOT to the blower motor, or any grounds. I have hooked up everything but am left with two brown wires joined at an eyelet terminal. Are these brown wires supposed to be the blower motor ground????

They were loose when I started and suspect that they should be screwed down (as it is an eyelet terminal) to achieve ground - but I am not sure. Any advise appreciated.
Thanks.
Michael