Extend the power cable

[UpDaTe]

Hi

I want to put the NAS on a shelf high enough off the floor
I am missing the length of the power cable (the part that goes from the unit to the NAS)
Is there an adapter to increase the length of the cable?
In the photo in the attachment, I showed which part needs to be increased

[UpDaTe]

Those. I want to put the power supply on the floor, and drag the power cable from it to the NAS, which is high

[TMSupport]

The position pointed in the picture does not support extension of the power cable.