EE 5G smart router

[Tiff12345]

I have just purchased this from EE 

https://shop.ee.co.uk/upgrade/dongles/upg-pay-monthly-mobile-broadband/smart-5g-hub/details

BUT no where does it say what type of aerial I can fit. 
it is going into an industry unit in the middle of no where with no broadband and no 5G, the 4G one was out of stock so I am hoping it’ll work on 4G but the unit is metal so I want to insert an aerial and stick it to the outside roof. 
Any help would be appreciated. But I don’t want to spend hundreds as simply can’t afford it.

[Chris_B]

@Tiff12345   It’ll work on 4G that’s not an issue it just covers 5G also.       You should be able to call customer service and they get one fitted for you for a fee. 

[Tiff12345]

Ok thx but EE ARENT GREAT so wanted to find one and get someone to fit it