The 22-year-old was previously linked with Premier League side Brighton and Hove Albion and although negotiations were finalised the deal fell through following a failed medical.
The Horses want the Ghanaian as a replacement for Nigerian striker Ahmed Musa who left the club for Saudi Arabian side Al Nassar last week following a brilliant campaign at the 2018 Fifa World Cup in Russia.
Goal understands that Dwamena may undergo a medical this week in Germany if the two clubs reach agreement on a transfer fee.
Last season, he scored nine goals in 32 appearances to help FC Zurich finish fourth in the Swiss top-flight.
The former Red Bull Salzburg forward also boasts of three international caps and two goals with Ghana.