rear brake light spring

[MikeM]

putting the rear brake light spring on, have attached to eye on the switch, was expecting to see a tab on brake arm but none there, does not look like its broke off or anything

where does the k3 spring attach to then ?

[LesterPiglet]

On the inside of your brake spindle thingy the lever attaches to is L shaped. You will see a notch in it. Spring connects to this.

http://www.cmsnl.com/honda-cb550k3-four-england_model14671/partslist/F18.html#results