Razer Studio 2020 Upgrades

Hi. I've just replaced the ram up to the maximum 64GB in my 15" Studio 2020. I was going to add a spare ssd while the back was off.... I was under the impression that a 2nd M.2 ssd could be installed in this model but I couldn't see a spare slot. Did I confuse this with another model? If not, where is it hiding?? Cheers