Yes, when you receive the PC, it will be in a large box. Within that box is the "welcome pack" which is a smaller box, in there are user manuals, and also any spares from the parts that weren't used in the build.This is probably something that is easy to find the answer for but I've not been able to.
Do the configured PCs come with additional cables, for example any PSU cables that aren't used in the build?
It may be worth getting someone to check over your specs.That's great, thanks for the fast reply. Now comes the impatient waiting for it to be built and arrive.