Phase ac power input dcs rossini and best way to connect a cec tl2n cd drive

Hi, i’m owner a dcs rossini with clock and very satisfied with it,i wonder what is the better side to plug the ac power,phase down neutral up or phase up and neutral down,when i try i don’t hear difference but i prefer to be sure plugging it properly…
I live in france,same plug as in uk?

I’m waiting for a cec tl2n drive cd,what is the best quality way to connect it to the rossini dac,optical,aes,spidf?
thank you and best regards!!