Before we had SMT devices we had small wired devices which someone would hand solder to a board. This is a micro resistor used in cameras and photography meters.
Pentax never offered a full schematic for the meter. But they did offer the analog side which you’ll find in the manual I posted in your other question.
Be careful! The wire legs are easy to snap off. The resistor is part of a voltage divider used to adjust the voltage of the sensor.