Seting up my new PC... Cables question

[Tempest]

This is probably a very very stupid question but this is the first time I've set up a high end desktop PC from straight out of the box, I'm used to laptops!

What are these cables for? Are they spares & nothing for me to worry about? Or do I need to plug them into sockets inside or outside the case?
PSB for images.







Before I plug the 3 pin kettle power lead, I wanted to make sure whether I need to plug these in first.

Cheers

 

[steaky360]

The one on the left is a molex connector (power all sorts) and the one on the right is a PCIe cable (typically used to power the graphics cards or other PCIe devices) however if they've come in the box and not in your PC chances are they are spare

 

[ricbai]

PCSpecialist appear to be extremely good at giving you what you would have received if you had built the machine yourself (spare cables, manuals etc) unlike "big box" manufacturers who just give you the assembled machine. PCS "expect" you to keep the machine for some time and expand it (hence the supply of spare cables). If the cables aren't in your machine when you receive them, you don't currently need them.