Remember which way the wire is connected. (top connector should have black wire at the top and bottom connector should have brown wire at the bottom). Both wires should have the “shiny” side facing you when inserting.
Yes “orange screws” does not need to be removed.
You do not need a TR10 screwdriver as written in the text a T10 will suffice (more common and also correctly mentioned in the list of tools).
A TR10 screwdriver is compatible with the T10, but not the other way around