Battery monitor permanent button

I installed two battery monitors in my camper van
(one to monitor everything going into the battery, and one to monitor everthing going out of the battery)
The unit was bougth from ebay (search for: "4 in 1 DC LCD Voltage Current Battery Monitor")

The recessed buttons on these units have to be pushed in with a little pin, which is not really handy. The button is used to enable and disable the backlight, but also to change settings.

I made these permanent buttons, which can be screwed or glued next to the unit. It has a pin on the backside of the button which activates the recessed button.

3 versions:

• black button
• button labeled 'IN'
• button labeled 'OUT'