Lock frustration. Took pictures, disassembled the lock, assembled with new cilinder: did not work properly. Conclusion 1: previous owner reversed it. Turned it around, still did not work. Conclusion 2: lock broken so that’s why they reversed it. Threw it away, started all over. Luckily my father was there to help so we did make some progress. Prepared central lock connections. Thanks to Ingmar for his input on this.