1989 Cali carb mystery electrical item

Can anyone please identify the attach item. It connects the 12V going to the ignition coils and earth.

In the photo, it’s the thing with ART written on it.

Thanks a lot for any help…..

I have a 1988 Cali 3 but don’t think it has one of them on it. Mine has carbs and originally points, but replaced with Dyna 3 electronic ignition.
A google lens search came up with a Ignition condensor for Motoplat systems. One required per bike Gutsibits item ELA27435

https://www.gutsibits.co.uk/pr/TheShop/index.php?q=ELA27435&f=d&Model=0&search=SEARCH

Okay. Thanks for that and wiring diagram.