please can you check what input source feeds the white wire to the "regulator" as instruction sheet states on point 8

ATTACH THE WIRE GOING TO THE IGNITION SWITCHED TERMINAL OF THE ALTERNATOR REGULATOR (INTERNAL OR EXTERNAL) TO THE ALT IGN B+ TERMINAL. (WHITE WIRE) THIS WIRE TURNS ON THE REGULATOR WHEN THE IGNITION SWITCH IS TURNED ON. (14GA)

ACC buss bar ? Coil wire ? some Ign swicth wire ?

Then also on Diagram is shown a red wire 18 gauge to feed the choke... same question... what source feeds that wire ? ACC buss bar ? some IGN switch wire ?

Remember the Painless diagram shows an extra ACCY WIRE brown 12 gauge