Those two taps are fused with the Wiper and the Back-up fuses.
They are connected directly to the load side of the fuse.
However----the two slots that you have wires plugged into may not be fused.
Battery is not fused-----and pretty sure the lamps are not fused either.
If the lamp side is fused, then it is fused with the dash lamps.
I'll have to go look at a an old box later----from a 59 but not much different at all