From a pure electrical theory stand point, yes they are normally break the positive side but as long as the circuit loop is broke it really will not effect the operation.
For troubleshooting it is best to keep the same convention through out so it is standardized.
Let us know if you ever find out why they want it the other way.
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Phil Krausz aboard the "Krazy Phisch"
Fishing from Pooles Island to the Bay Bridge
Proud member of the MSSA and CCA
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