Doepfer

You always have to think in terms of source&destination:

the wasp filter out (source) must be plugged to the 1st VCA input (destination)

as well as the 1st VCA out must be plugged to the 2nd VCA input

so the two yellow cables (starting from right) are misplaced in the picture

If you are at ease with english and reading - and want to give yourself a better basis for the modular thing - search for the second edition of this book

Allen Strange, Electronic Music: systems, techniques and controls

there's should be a couple of editions available on the web