A few melted spots in headlight harness

this points to the driver headlight being the problem? Running cheapo aftermarket halogens, just bolted them in place when I was 16, never thought twice about it. I'm thinking about buying new headlights soon, do yall think the halogens are what caused the problem, or just old car with shoddy wiring?
a. Yes - probably the halogens are causing a higher current draw than originals. However some halogens actually draw less than original. Look at the number and we'll know which lamp is in there. 6012, H6014, or H6024
b. Look for insulation damage where the wires come through the headlight buckets. I've had that where the wire insulation had rubbed through and contact a second wire or even ground. If it grounds it should trip the circuit breaker, but maybe too late. :(
c. Probably want to redo your repairs - we all learn to do better.

d. Yup add a relay harness. Well worth it. The a-body headlight wiring wsa only 16 and 18 ga. really minimal.