With the consumer saws- often it is easier to use what you can find.
Hardware store fixings- but they need to be metric.
You will not have the luxury of stepped shanks so the fixing remains in the top cover- but they will hold the covers in place.
May not be Husqvarna black, might be zinc coated- but they will still work.
If I have saws show up with missing bolts and they used to be flatheat slot or phillips screws- I often swap them out for hex drive cap head or T27 fixings.