My watering project with KC868 H16B

[Max]

I downloaded the file again, and now it works. IFTTT works well, I can set timers at a well defined time.
However, I can't understand what the inputs of the KC868H16 relay controller are used for, I would like that when one of these inputs is activated by a dry contact, it activates an output of KC868H16. Is it possible and how to do it ?
Another question: the RUN light of the COLB, blinks all the time (the internal battery is good), is it normal?


Thanks.