1) He was expecting a delivery, so he stayed at home in case it arrived.
In the above sentence, I feel some connectivity is missing between "so he stayed at home" and "in case it arrived" and there should be some words between the 2 double quoted phrases.
2) He was expecting a delivery, so he stayed at home as it could arrive.
The above sentence is something I prefer to use.
So, I need to know if I' m wrong in constructing the 2nd sentence. I want some clarity on the 1st sentence as well.