Cardiff manager Omer Riza would not confirm the club’s interest in Salech but said: “We are in the process in respect of transfers and are working hard.
“We are coming closer to getting some stuff done. Until we see them in a blue shirt with a badge on their chest you can never be certain. Things are moving forward.”
Born in Denmark to a Palestinian father and Polish mother, Salech also qualifies to play for Jordan.
If he is registered as a Cardiff player by midday on Friday, his debut could come in Saturday’s south Wales derby against Swansea City at Cardiff City Stadium.
The Bluebirds are short of genuine centre-forwards, with Wilfried Kanga failing to score in 16 appearances on loan from Hertha Berlin this season.
Kion Etete only made his first appearance of the campaign last week after a hamstring injury, while the untried Roko Simic is back at the club after an unsuccessful loan at KV Kortrijk.