Hello everyone and thanks again for all the replies.
So far, under Onewizard's guidance, I've managed to fix the headlights indicator, here's how it went:
First I tested the instrument cluster itself, and all the LEDs were lighting up and everything was working. While I was testing the wires for resistance, I found that the red wire with black tracer on it had no resistance from the instrumet cluster plug to the waterproof joing under the gas tank (it's the blue plug/socket). The red wire with black tracer belongs to the high beam, dimmer switch and also goes into the instrument cluster to terminal 11 which is the high beam indicator light. Correct me if my expression is wrong.
After this I cut into the protective rubber from the dimmer switch assembly wire harness and inside i found that the red wire the black tracer, red wire with yellow tracer and blue wire with yellow tracer (dimmer switch wires) were cut, and to them the low beam/high beam bulb sockets were directly wired to the leads that go into the dimmer switch, and the other leads were just hanging inside. A previous owner did this and the reason remains unkown to me.
I cut and cleaned every wire and I soldered back together the dimmer switch red wire with black tracer and red wire with yellow tracer with the wires that went into the harness of the same color, which were originally cut. To these wires I soldered back the high beam/low beam plugs and the indicator now works when flashing or turning on high beam.
I did not find the blue wire with yellow tracer's other end, but I will get back to it as this needs to be soldered back aswell so that both LB and HB work simultaneously, I think this is why the previously did not.
I will return with an update once I fix the headlights staying on during ignition (all the time) and not turning off when cranking the engine, as the fix was explained to me, but didn't have enough time to apply, between the indicator problem and other maintenance issues I've encountered.
A special thanks to Onewizard for guiding me and explaining to me how these things work, as I am about as rookie as it gets when it comes to electronics.