I remember this problem now!
Have you got the click box and a cable stoPper bracket. Ebay has a selection for stermely archer. If you could let me know where and what size bracket you find works best on your build and I will get another similar one for spares. The bracket on my black bike has never needed attention. The gold cable bracket bike loosens sometimes. My black bike seems to live a charmed life!
Ie it rarely seems to throw a chain, rarely needs adjusting, the lighht batteries seem to last longer etc.
Touch wood!