7805 sense resistors
The 78xx family uses the same die.

Vsense is connected to Vout in the standard family.

The difference between a 7805, 7812, 7815, 7824 etc is which of the shorted-out resistors (R12, R26 etc) gets opened to program the correct voltage. They form a programmable voltage divider from the output to the sense input with R10 and R13.