Welcome to the Asylum!
They are probably for the chair lift assembly. Mine had no chairlift, but it still had all the wiring for it in there (mine didn't even have the door).
Anywho, best bet would be to acquire wiring diagrams for the truck side as well as the coach side, BlueBird, Corbeil, Thomas, etc.
Don't cut/remove anything until you know what it is first.
And good luck with the new rig!
Cheers
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The Build: https://sunnythebus.com/
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