I had the same problem after not paying attention to the connections when replacing my motor. I spent days searching for information and only found several non-answers with small photos that no one can read.I contacted Oreck for wiring information. They explicitly stated that they can't provide any wiring information for safety and liability reasons.
I found the Ametek schematic which shows the LINE and TAP locations on the motor.
Note: I have a 2600HH XL with 2 headlights.
Connect as follows:
3A, LINE: White lead w/piggy back terminal from light harness #1 & white lead from the power harness to the piggy back terminal
2A, TAP: Black lead from light harness #1
3B, LINE: White lead w/piggy back terminal from light harness #2 & black lead from the power harness
2B, TAP: Black lead from light harness #2
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