1990 7.3 IDI F250.

Just got brand new battery cables made up, new alternator, found all the info I could off the net, wired it up as indicated, however the instruments on the dash seem to be stuck half way ( The fuel gauge and temp mainly ), and when the ignition should go on, nothing happens.

Additional notes of consideration, the previous owner wired up a start button on the dash, and there is a bulkhead starter on the inner fender as well - all was working fine before. The white stator wires are crossed/joined, and I have yellow/white and green/red wires going to the matching yellow and green wires on the loom, old voltage regulator and wires to the old alternator are removed now ( but I still have them to hand ).

Any thoughts ? My guess is its a wire wrong or a wire I am missing or should not have cut, the instructions I followed were from here ....https://www.ford-trucks.com/forums/9...ring-help.html , and here ....
Piece of cake 3G alternator upgrade - Diesel Forum - TheDieselStop.com




EDIT/ADD: This is a dumb one, but looking over some other threads, is the red wire I'm running off the + off the back of the alternator meant to go to the battery + or the start solenoid ( in my case the bulkhead starter button ? I'm getting mixed ideas from different places, and I have a bulkhead starter button, not a starter solenoid, solenoid being on the starter itself ( unless I reading that wrong being in the U.K, things are worded a bit differently, sorry ).