Changing 110V to 240V for Simaudio P5.3

From what I can see from the images present on the Sim web site, there are jumpers next to IEC socket.

I just got a used one from this web.
Can anyone help in more details?

I can't help with Simaudio, but I have changed my equipment from 110 to 220V and if I had to do it again I would instead find a stepdown transformer that was built as an isolation transformer with balanced power out. It is a mouthful, I know, but it is a lot easier than you might think. That way you wouldn't need to tinker with your Simaudio and would get the benefit from an isolation transformer and balanced power.

Just a thought, though. I don't mean to derail your thread.
FWIW, my components were switched to 220V by my US dealer before I moved out. Maybe ask a dealer?

Lewinskih01, thanks
that's what I'm doing it, I got a "made in China" stepdown transformer 220>110 in my system.
BTW, could you enlighten me a bit more on " would get the benefit from an isolation transformer and balanced power."
Sounds like a better idea?