Alternator wiring

Be careful fusing the headlights. The headlight switch originally has two sources of power

1--A great big lead from the splice feeds directly to the switch which already has a breaker in/ on the switch.
2--Tail/ park/ dash lamp power comes from the tail lamp fuse

3--The other "little trick" is that dash lamp power comes OUT of the dash dimmer and then goes to the instrument fuse.

Since you are "into this" you might also consider headlight relays to relieve the strain on the light, dimmer switches, and again, bulkhead connector.

Also be careful where you mount such things as fuse links, breakers, and fuses, as they are degraded by high temp, AKA engine heat.