Eva888: Where does one begin with the mess? Some cable management ideas would be very welcome.
For starters, consolidate all the wall warts, it looks like you've got USB power there and presumably some 12V as well, replace all the 12V ones with a single Meanwell 12V power brick and all the USB ones with a single good-quality multi-outlet USB power block like an Anker. Once you're reduced the 4+ wall warts to one or two you can look at the other cables. Firstly, replace the UK power plug and adapter with a NZ one to make it NZ-legal. Then get rid of anything that's not used, e.g. the unplugged white wall wart bottom left. Then post an updated photo of what's left for further comment...




