BACK WHEEL

Hi all, just taken the back wheel off my dax, a spacer washer fell to the floor , which side does it go, ive looked on the diagrams but its not shown, it is about 15mm thick, there is a boss in the hub on the sprocket side, i think the spacer should go on the brake shoe hub side, but i'm not sure
thanks wayne

Sprocket side

hi, ive found it on the rear wheel diagram, its item 9 brake drum side, the one on the sprocket side is about 3 times as long
thanks wayne