I found a nice way tin include socket pins on the standard A-101 PCB that are supplied witht the decatron. I share it for others to benefit. These are standard ferule bootlaces dimensions 100x2.5/8mm (or "Aderendhulen mit kunststoffkragen" in German language as the German manufactyrer states). They fit into the socket, but it is best to file the PCB a bit to give to tube room. Solder fast and in one act. See pictures attached.