In a specific example, the third fastener structure 808 includes an extended holding structure, and the fourth fastener structure 728 of the device housing 702 includes a recess hole configured to receive the extended holding structure. The extended holding structure may be pulled out of the recess hole of the device housing 702 when the device housing 702 slides along a longitudinal direction 812A or a transversal direction 812B, but not when the device housing 702 is pulled by a separation force having a direction perpendicular to a front exterior surface of the device housing 702. Further, the first fastener structure 806 may include a snap fastener configured to lock onto the respective fastener structure 726 of the device housing 702. Once locked onto each other, the snap fastener 806 and the respective fastener structure 726 securely hold the device housing 702 onto the mounting plate 800, thereby onto the wall or doorframe surface to which the mounting plate 800 is mounted. Alternatively, in another example, each of the first and third fastener structures 806 and 808 includes a respective snap fastener configured to lock onto the respective fastener structure 726 or 728. The mounting plate 800 may include an opening 810 configured to let through one or more electrical wires, such as the power supply line and the ground line that can be electrically coupled to the plurality of wire terminals 720 of the doorbell camera 106. In some implementations, in accordance with the process 850 of mounting the doorbell camera 106, the mounting plate 800 is fixed onto an area of the surface where the power supply line and the ground line are located. The power supply and ground lines come out of the surface, pass through the opening 810, and are connected to the plurality of wire terminals 720 located at the rear exterior surface of the doorbell camera 106. The device housing 702 is then mounted onto the mounting plate 800 via the fasteners 806 and 808 and their respective fasteners 726 and 728 located at the rear exterior surface of the doorbell camera 106. The power supply and ground lines are concealed within the opening 810 of the mounting plate 800 and the first recess 724A of the device housing 702. Under these circumstances, the depth of the first recess 724A is configured such that a cumulative depth that sums the depth of the first recess 724A and a depth of the opening 810 is greater than a height of connections formed between the plurality of wire terminals 720 and the power supply and ground lines.