a shielding cover accessory, wherein the shielding cover accessory is fixedly connected to the shielding cover body, and the shielding cover accessory includes:

an accessory bottom including a flat bottom;

a connecting arm, wherein the shielding cover accessory is connected to the shielding cover body through the connecting arm; and

a positioning arm, wherein the connecting arm and the positioning arm are connected to two opposite ends of the accessory bottom, and the connecting arm and the positioning arm are configured to protrude in opposite directions from the accessory bottom,

wherein the shielding cover accessory further includes a plurality of card slots, the plurality of card slots are arranged at positions of the flat bottom close to the positioning arm, each card slot is configured to penetrate the flat bottom in a direction perpendicular to the flat bottom, and the plurality of card slots are arranged at intervals in a direction parallel to an extending direction of the positioning arm.

According to some exemplary embodiments, a shape of an orthographic projection of each card slot on the flat bottom has a rectangular shape, each card slot has a first size in a direction parallel to the extending direction of the positioning arm and a second size in a direction perpendicular to the extending direction of the positioning arm, and the first size is greater than the second size.