Solved! While it is definitely no standardized plug, my solution is that I found a cheap LED extension cord on ebay, gonna hack a few of those apart....
That little flat part seems to be the piece that makes the connector proprietary and ensures that users won’t hook up a power supply that is not compatible. I would consider cutting it out of the way, allowing the above linked connectors to fit. As an electrician and electronics enthusiast, I have done something similar on multiple occasions. Just ensure you are supplying the proper voltage to avoid any damage.
[solved] Can I buy the f-side of this connector standalone? Osram Ledvance LED stripe, Xing Yuan AC adapter XY12LD-120100VQ-ET (feddit.de)
Solved! While it is definitely no standardized plug, my solution is that I found a cheap LED extension cord on ebay, gonna hack a few of those apart....