over

“Therefore Rupert couldn’t have operated the lever. Is that what you’re saying?”
“Exactly! If he had, Galligantus would have been triggered. But he wasn’t, of course, because the vicar’s bicycle clip was clamped over the end of the lever. Black on black. Rupert mustn’t have noticed it.”
“Good Lord!” the Inspector exclaimed, realizing what I was saying. “Then it wasn’t –“
“A tragic acciedent? No, Inspector. I should hardly say so.”
He let out a low whistle.
“See this? Someone’s cut away the insulation from this cable,” I went on, “right down to the bare wire, then shoved the bicycle clip down on tip to cover it. The other end of the bicycle clip is clamped over the end of Galligantus’s lever.”
“Forming an electrical jumper,” he said. “A deliberate short circuit.”
“Precisely,” I said, “Here – you can see the deposit of carbon where it arched. See where the wood beneath it is a little charred?”

Does ‘over’ mean ‘up toward’?