[NTG-context] ToC - dots distance

Hi, I need to change the default distance of dots in ToC using alternative "c". Could anybody tell me, how can I achieve this? So it should look like this: default look: 1. First chapter ................... 1 2. Second chapter ................... 10 requested look: 1. First chapter . . . . . . . . . . 1 2. Second chapter . . . . . . . . . . 10 Thank for any help. Pavel