Rear Modolo brake pinch bolt won’t pinch 🤔

[CrashRescue]

My rear Modolo brake pinch bolt won’t pinch the cable tight. A good pull on the lever and the cable pulls through. Any suggestions for remedies please?

 

[SteelNipple]

Can you take a picture of the pinch bolt with the brake cable? It goes in only "one" way and has a groove and a hole for the brake cable. Maybe you have assembled it the wrong way.

 

[bikeworkshop]

Sometimes the clamping washer is missing (or too thin) and the nut reaches the ends of the threads.