How do I get drivers for Windows 10 x64 installed on my Mac?

I've just installed windows 10 x64 on my mac, a partition that I made with Disk Utility. I was going to use BootCamp however the way BootCamp formatted the partition in El Capitan didn't allow Windows to be installed (I believe it was because of not formatting it correctly). So now I've got it all installed however the drivers aren't (headphones and Wifi don't work; plus I'm not sure it's using my graphics card either). How do I go about installing the drivers I need for this version of Windows?