Help/ Network

[Markallen3]

My brother atm set up his new pc next to mine and mine is connected to the router via wireless since there is no cables to the room we are in and he doesn't want to buy a wireless card but we will be buying some cables to run later in the week is there any way he could cable in to me and connect to the net via that way?

If so i need some clear instructions on how to set it all up