Hello! This object is a battery grip suitable for Nikon F601M (N6000). It's using 4 AAA (LR03) batteries connected in series so the total voltage is equal to that of the original battery.
The batteries are held in place with two battery holders (link below), but they can also be attached in any differente way you wish. Keep in mind the importance of connecting properly the polarity of the circuit.
The wires are connected to the camera pins with metal hexagonal screwdriver heads since they are quite common. You can use any 28mm long metal piece (wide enough to ensure they are in contact with the pins). Those pieces can be held in place using hot glue.
Despite the grip itself fits tightly into the battery compartment of the camera, a 1/4 screw (link below) is required for aditional support. The hook must be removed.