just be aware, your european power board is rated for 16A, typical outlet fuse/breaker is 15A, this adaptor is rated at 6A. this will be a hazard kung lalampas ka ng 6A.
i would suggest getting a better (higher-rated) adaptor. and if you have no near-term plans to bring that power board to back to europe (if ever), why not just get a decent male Type A plug and replace it?