cargo box on Nuevo

I have just bought a cargo box to fix on the cycle rack of my 2008 Nuevo, the box itself weighs about 8Kg what sort of weight of stuff can I put into it  - I see nothing in the handbook and unlike my last van there is no load limit sticker on the cycle rack.

Hi Raymondo
Fiamma ultra box 180 weighing in at 6.5kg, the max carrying weight is 50 kg. 320 box weighs 12kg,
360 box weighs 14 kg and the 500 box weighs 17 kgs
Boaby

Thanks, what I have is an "Omnistor 150" which is 450L capacity (I suppose I should have said that at the start!)

whilst I dont intend loading a lot of heavy stuff into it I am aware that the weight soon mounts up.

Its the load capacity of the cycle rack and rear wall of the Nuevo I am most concerned about.