Boss Mark Cooper pursued the striker for four weeks before eventually snapping up the 26-year-old when his contract was terminated and he explained the role N'Guessan's former Lions team-mate had in the deal.
"Darren Ward knows him well from Millwall and Darren gave him a good reference and that was key," he told the Swindon Advertiser.
"If Darren gives somebody a good reference we know they must be a decent character.
"He's good technically, he's physical, he's got a bit of pace about him and he can score goals. He gives us the option playing out wide or down the middle."
- Arts & Entertainment