You are a lucky man!
The gate out on the Werkstatt can be used as a gate in as well, so that's a little weird but it works fine. Some people do a mod to have a separate gate in that is"legitimate" I guess or cleaner circuitry, but the gate out/in jack has worked fine for me.
For pitch you want to jack in to the VCO EXP FM IN. That's it.
I've been jacking the frequency from the beatstep pro into the LFO IN usually with nice results, but hey it's CV, play around with different combos.
And grab some nice looking knobs!