This thing is a replacement 15-degree shim designed to make wired installations easier and fit better. These Eufy products have many clever design details, but they failed in the case of the 15-degree shim design, if you intend a wired installation. Bottom line is that unless your installation has the wires coming out of the jamb exactly at the Eufy terminals there is no place for the excess wire to go. So, it ends up sandwiched between the OEM provided wedge and the jamb and the wedge won't sit flat. This looks ugly and can cause the main mount to bend when you tighten everything down, so the camera doesn't insert or release easily if at all. This replacement shim includes a channel in back of the shim for the wire to nestle into without distorting the mounting interface.