supports for robot accessories

Here are some supports for robot accessories.
Battery support for a 4XAAA battery holder (four corners)
Battery support for a 9V battery (two ends).
both are fixed by M3 screws, and are designed for pozi csk screws (see screw pic), although other type of screw can probably be used.
Support for infrared sensor.
Support for ultrasonic sensor.
Also using pozi csk screws for fixing the supports to the robot base, any screw type to fix the sensor to the support.