You will want to change the meter faces to have them display hours and minutes instead of microamperes, Two basic designs are below. There are other creative designs on the Internet.
The meters have four mounting posts providing a sturdy mount on nearly any surface. For my less than traditional mounting method, I placed the meters side by side. I planned to put the circuit board behind the meters. For this I nned a flat surface and the meter movements stick out from the rear. I fashioned 3/8" thick wood precut to 1 3/4" widths. I cut one piece at 2 7/8" to connect the meters, another at 2 1/4" to bring the level up to the back of the meter movements. Two screws (not too long!) from the screw bin were inset to connect the pieces and it was mounted to the meter with the included nuts. A 3D printed mount would be another method to make custom pieces.
If you mount the meters in a box, you have much more flexibility on circuit board placement.
And the modern mounting box I used. I borrowed the napkin holder bought at clearance at Kohls. It's not what you get, it's what you do with it.