There are 2 screws that look like hex intonation screws : I don'tunderstand how it would work , but it looks like intonation screws ....
Those two little screws in the back simply hold the steel back plate (the 'saddle', actually) onto the polymer plate.
How it works: the single center screw near the back of the bridge is what sets the string action over the neck and supports the entire bridge under the string's tension. The bridge rests on top of this screw's head.
The two screws at the front of the bridge run down through the bridge and do two things; (1) they adjust the angle of the bridge laterally across the body (bass strings higher and treble strings lower) and (2) they are what sets the 'ramp' angle that allows the strings to buzz against the six little channels in the front ofthe bridge. The front of the bridge is under these screws' heads.
Simply put, the bridge is basically a lever that pivots on that single rear fulcrum screw, with the strings imparting a downforce on the back end of the bridge and the two front screws keeping the front of the bridge from lifting up.
It's all quite fiddly at first, but once you understand what the screws do it's easy to set up.

I'm in the process of building an electric sitar, so I've given a wjhole lot of thought to how it all works.