A large capacitor was laid on its side to avoid interference with the wire wrap posts. This cap is soldered in parallel with a diode (a "reverse recovery" current is caused by sudden voltage changes to the diode. This sharp current edge causes high frequency noise, which is trapped by this capcitor). It lies over the top of three resistors.
The replacement cap is less than one quarter of the size. It now stands upright!!! Notice the two capacitors to the right are also smaller. Note the circuit markings (circles)