attached photos - a reproduction i made of figure 1 from installation bulletin for 986067 radio showing the A lead fuse holder and the dial light lead - a photo from ebay of an original A lead fuse holder connector, both halves
the A lead is meant to connect directly at the amp-meter post, the early radio draws over 6 amps with it's electro-dymanic speaker accounting for half that current, you don't want that on the ignition switch later it shipped with a permanent magnet speaker, but that's still about 3 and change amps
the dial lead connects on the light switch where the dial lights are connected, the radio comes with both wires long enough to reach these locations from inside the radio both wires are approximately 26 inches to their respective ends. hope that helps -s