Just add this to extension\ext_config.ini
[DI_DRIVEN_TOTAL_0]
DIGITAL_ITEM=1
DIGITAL_ITEM_NUMBER_FORMAT=.0
UPPER_BOUND=999999
And this to extension\data_override\digital_instruments.ini (create folder and file)
[ITEM_0]
PARENT=DISPLAY_CLOCK
POSITION=0.005,-0.001,0
TYPE=CLOCK
SIZE=0.0138
COLOR=20,20,20
INTENSITY=0.5
FONT=led_audi
ALIGN=LEFT