Where does the battery/ecu strap attach on the left side?

I can see the right side has a little extended area which you can loop the elastic around, but I can’t see any attachment on the left side of the bike.

I assume the strap goes over the ecu as the final piece before the seat?

 

Here's a link to download the service manual for that bike, should be able to find how it attaches there
https://www.carlsalter.com/download.asp?p=1968