HO Alt Plug Help

[Bumpindemlowzz]

I have a alt that was originally purchased for a jeep from excessive amperage that would have needed a bracket made. I was wondering if it would fit my 2000 blazer 4 door 6cyl. From what i understand its a ad244 but i compared plugs and they dont match which leads me to think it wont fit my blazer. HO Alt came with a 1-wire plug harness with a resister or diode which i lost but can purchase again. Heres some pics.

Any help would be awesome to identify this alt.

[Bumpindemlowzz]

I can made one of these adapters or maybe keep stock alt and do a dual alt setup