Help me identify old cartridge.

On bottom near pins it has printed H.O. and on front OL.2.
I think it is a Monster cartridge. I lost the original box.
I may not use but as a backup. Still want setup info.
Thanks for the help.
I have added a picture of the cartridge in my system.
Thanks again
I think it is a Monster Alpha 2
I think its a Monster also.
Do you know where I can get the setup info?