Did you try starting the order claim process in the Dashboard?   I seem to recall that it gives you details of what's contained, before you actually commit to claiming it?   (I must admit:   it's a while since I claimed an order number, rather than just a license - which definitely does something along those lines.)   The Cisco partner, who you placed your order through, should also be able to give you all the details - or get hold of your Meraki account team - details are under Help > Get help > Still need help? > Contact your Meraki sales representative, in the Dashboard.
Is there a reason why you need to know what's in it, before claiming?   You can always rollback a claim, for a period after doing so...