A unique deal was agreed for Ait-Nouri at the back end of last week, and it is now only a matter of finalising the last details before an announcement.
The club will pay Angers £10million while the French side hold a 50 per sent sell-on clause – which Wolves have the option to buy out at a later date.
Ait-Nouri will be Wolves’ third signing under Bruno Lage, after Colombian centre-half Yerson Mosquera and Barcelona winger Francisco Trincao.
And with the 20-year-old’s move all set to be completed shortly, fellow full-back Vinagre is being allowed to leave.
A season-long loan deal has been agreed with Sporting, who then have the option to buy him for £10m next summer.
It is also understood there are appearance-based clauses which, if met, would make his move to the Portuguese capital permanent.
Ait-Nouri impressed while on loan at Molineux last season, making 24 appearances in all competitions.
There was originally an option of around £18m to make his move to Wolves permanent, before the club negotiated a lower price up front.
Vinagre, meanwhile, had two loan spells away last campaign – an unfruitful stint with Greek outfit Olympiacos before a successful period with Famalicao in Portugal, gaining the attention of title-winners Sporting.
He had mainly served as Wolves’ back-up to Jonny Castro Otto after joining from Monaco, playing 70 times in total.