Double check your wiring where the control box used to be:
1. The thin black earth cable is not needed and can be disregarded.
2. The thin Brown/Green & thin Brown/Yellow cable should be joined, this is the connection between the small field terminal on the Alternator and the dash warning light.
3. This should leave you with 5 thicker cables, 2 x Brown/Blue (Lights), 1 x Brown/Yellow (Alternator) & 2 x Brown (Solenoid & Horn), these need joining together.
Every Lucas ACR Alternator I've ever worked with has only has 3 terminals on the back, the 2 larger ones (3/8") which feed back to the battery, and one smaller (1/4") which goes back to the warning light on the dash. You should be able to use a standard Lucas connector like this one:
The additional wire is to do with the output of the alternator. The standard wire on a Herald loom will only be good for 25amp, so if the alternator has a greater output then use the second large terminal to run another cable back to the battery.
To test the Alternator you could start the car without the alternator connected and connect a multi-meter to each of the terminals, if you get a reading of 12v or more then you know it's charging.
Hope that helps.