The location is near August-Liebig-Weg 9, 65191 Wiesbaden, Germany
Directions:
By car: Be sober, open car door, drive to the place your sat nav tells you to go to. Park car in the car park area.
By public transport (www.rmv.de):
Grab a beer, take SBahn from Frankfurt S1,S8 or S9 or a region train to Wiesbaden. Then catch two busses. #1 and then #21. Get off at Kappenbergweg. Continue to walk up the road and August-Liebig-Weg will be on your right.
You could also get the SBahn to Niederhausen...but you can sort that route out on your own.
You are all grown ups (legally), I am sure you will figure it out.