Do the triggers and lock function properly?
I can't see the photo very well, but some screw holes could be for internal screws.
The screw in between the double set triggers seems to be in place.
Are you sure that screws are missing, and that the holes are threaded and without screws?
Try to contact Traditions either by phone or email to ask question or to obtain screws.
If you really need screws then Traditions should know about which screws to send if you call and speak to a live person.
Traditions contact info.--->>>
https://www.traditionsfirearms.com/contact-us
Phone# 860-388-4656
Monday - Thursday 7:45am-4:30pm Eastern Time
Friday 7:45-3:15pm
I could not identify the screws on their schematic or from your photo.
See if you can identify the screws on the parts list for the gun.
Are they both located on the underside of the double set trigger plate?
There's 2 manuals with Hawken parts diagrams on the Traditions manuals page [the Hawken manual and the sidelock manual, but I can not identify the screws]:--->>>
https://www.traditionsfirearms.com/support/product-owner-manuals