Physically Securing Gateway - "K Slot"

Why is there know "K-slot" like is present on every laptop sold available on the newest "FAST 5688W" Gateway?  First there is no connection for an external antenna and then no way to secure it if you place it outside your home (I know weather issues).  I cannot get above 4G LTE in my house yet on my screened in porch, I can get 5G.  I have placed it in the window inside my home that looks out onto this porch, but still only 4G LTE.  I have a place on my porch where it would stay out of the weather (rain/sun), but I have no way to secure it from theft out there.  Humidity is an issue too, but if they don't want to provide an external antenna jacks for a MIMO antenna and no way to secure it, I am running out of options to get decent signal.