Slade was keen to give 'Abdul' a further run out against Scunthorpe last Friday but couldn't get international clearance through in time.
Now with that problem sorted, Tangara is set to start against the Dutchmen who are in England as part of a three-game tour that also sees them face Rushden and Gillingham.
Graham Hockless, Stacy Coldicott and Simon Ramsden are likely to miss out with injury whilst Darren Mansaram will start up front as he too tries to impress Slade, this time for an improved deal.
Willem will mainly be an unknown quantity to Town despite reasonable success in their homeland and regulars in the European competitions. Former Ipswich winger Martijn Reuser and ex West Brom and Blackpool striker James Quinn will be recognisable though.