Jumper cable in nutone BKL342LWH

So can’t find any info on this particular chime… where do the jumper cables go on this?

There are no screws. Four wires.

Four holes where wires disappear. Marked as follows:

F with a red wire
Com1 with a black wire
R with a red wire
Com2 with black

Front panel (not the chime cover) does not come off.
Help. Please and thank you.

Hi @Jbjbean. The Jumper is placed between the wire that goes to your transformer and your Doorbell. I’m not able to tell what those wires are from this picture, but if you check with the manufacturer, I’m sure they will let you know.