This info is from the archives so may or may not be correct. M103 originally
has non resister wire but had a resistor in each plug connector and non-resistor plugs.
At some point the big thinks decided to use resistor plugs and non resistor plug connectors and non resistor wire. So the answer to your question might be decided by what wire set you have. If what I said is not correct I would like to know what is correct.