I am in the process of cleaing up the wiring in my E24 and behind the Radio & OBC there are 3 wires that have inline fuses (all of which were empty LOL) most likely cause the radio was draining the battery from bad wiring which I am cleaing up.

Anyone know what Amp fuses I should put in these? They're the old glass type. 2 of the wires go to the radio and the third is a mystery wire so far. Pretty thick wires too, about 12 gauge. I do not have the Bentley yet, and I can not find wiring diagrams.

Thanks