Unusual game cartridge

[NW12]

My son recently bought pacman for his NES and we are unsure about the cartridge, it is black, doesn't have the indent at the end to grip to pull out, and has a plug socket at the end with pins? Is it a famicom, fake, other? Any info would be greatly received, at the moment unsure about sticking it in the console

 

[ccehack]

Does it say Tengen on the side? Like this one-

If it is this one, it's definitely safe to put in. I'm pretty sure that the Tengen Pac-Man is officially licensed too so don't worry about that either. If anything I said was wrong someone please feel free to correct me, and if that isn't the cart then I'm sorry.