replacing the alternator 70 RR

[Old Crow]

OK, so I ordered an alternator from a local parts house a few months ago. Put the old one in the box as a core and sent it back.
Now I'm finally getting around to putting it on the car and wiring it. This has been a complete restoration and the car has been apart for around 6 years(another long story).
So, anyway, I ran the wiring harness out to the alternator and found that the harness has provisions for the big positive wire and 2 blade terminals(dk blue and dk green), but the new alternator has only one blade terminal. Regulator is the electronic one, not the older mechanical one.
Did a little research on the parts store web site and they show the one blade alternators up to '72 where it changes to a 2 blade plus the positive wire.
Am I going to have to order the newer alternator to make this work or what?

 

[super-bee_ski]

see if this will help.
Yes, 2 different Alternators
1. Square Back
2. Round Back

- - - Updated - - -

Disregard previous pictures...

This is what you need OR a Jumper (Blade type between the 2)

 

[440+6]

My 70 gtx has the dual field alternator, In 70 they went to dual field and electronic regulator.
View attachment 198298

 

[super-bee_ski]

440+6 Has the correct info for you Old Crow

 

[Old Crow]

Yes, the car is wired for the proper dual field alt., but the alt I received from O'Reilly's was wrong. If you do the lookup in their web site, it's still listing the single field alt for a '70. If you put in '72 as the year model, then it brings up the dual field.
Called the parts store, and since I could tell them the problem and since I do about $1000/month with them, they're going to swap me out for the correct alternator.
Thanks for the confirmation, and the diagrams.