Ok, but do you absolutely need to use the other outputs on the alt if it's a secondary alt? Also, I'm not trying to replace the original alt in my truck, it's only a few days old.
yes you need to use all wires for it to charge not unless you get a 1 wire alternator
not true
trust me, my truck had a si10 alt in it and i upgraded it to the cs130 and pluged up the charging wire and when i turned on my truck it was 12.3 volts even if i was at 2k rpm. i got the red wire from my pigtail and wired it to distribution block constant power and still at 12.3 volts, then i was reading about the alternator voltage regulator needing to get excited before being able to charge so i read on it some more and it said to get a 500ohm resister and put it on the white wire and run it to the ignition and bam i was charging at 14.4. you can also use an idiot light and that will help charge too, mine is GM though so for might be different but could be easy if you read about it.
edit:as long as the excite wire and volt sense wire is connected you are good
some fords have external regulators so you might just be lucky and plugging in the charging wire is good enough