How do you assemble the inside of a door knob the actual guts not the slide through hole tighten screws stuff lol its a keyed entry and it was disassembled thinking it could be reassembled?

To assemble the guts of a keyed entry door knob, start by inserting the cylinder into the knob housing, ensuring the tailpiece aligns with the knob mechanism. Next, place the spring and the latch mechanism inside the housing, making sure it fits snugly. Once everything is in position, slide the other half of the knob onto the housing and secure it with screws. Finally, test the operation by inserting the key and turning the knob to ensure everything functions correctly.