No special access issues
Follow the Cable car signs of of A12, they will lead you to the Hungerburg. You need to Park near the Cable car station at the Hungerburg, then take the Nordketten bahn (cabe car) up to Seegrube, not all the way up. The bus J or the Hungerburgbahn are other options to get to the Cable car station, (Hungerburg).
To get to Sonnendeck with its 4 sectors Punta Painia, Plattenturm, Löcherwand and Steinbochwandl, head up he wide path behind the Seegrube station (turns left). At the end of theis pach turn sharp right around a white gas tank and head straight uphill. The path is dfficult head up to the rock faces then traverse toward the crag, be careful!
To get to all the other sectors head straight West along the Nordkette on the clearly marked path (red and white stripes) until you are right underneath the sector you want to reach, then scramble up towards the respective sector. They can all easily be seen from the path at the bottom.
Use the trails on the map as a reference to better find the sectors, Have fun and be safe!