Better Power cable to connect to

Iv’e connected a Processor and a transport streamer and a TV to McIntosh controller MPC500.
I have a few power cords.
One better and the other regular ones.
Is it preferred to use the Better Power cord to a streamer transport or to a Pre Amp / TV or to the controller ( first in line chain ) ?
Thank you.

Streamer first.

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Thank you.

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