Can I drive these rims at all??

Hello people! First of all: I have no idea about rims/tires and ABEs/certificates! I bought a VW T4 VR6 built in 1996 a few days ago. In addition, there were summer tires mounted on Ronal-Alus in the trunk and winter tires on Alutec-Alus on the vehicle. In addition, a large pile of unsorted ABEs and expert reports… the seller probably didn’t quite look through there. Today I sorted the paperwork and the result: Most papers are for the rims in the trunk and then the a still some papers for BBS rims for BMW! So has nothing to do with me! So I already have no papers for the mounted rims! Prima -.- The KBA number is 46395 (and that led me to the “Alutec Nitro” rims type “NI757 5 hole”: http://www.alutec.de/…/abe-tuev-expertise-alt On the page there are also many ABEs and reports to download, but not for the T4! So I see right now that I can’t drive these rims at all? What can I do? Can ic h which still have to be registered? By the way, 205/65R15C tyres are registered in the vehicle certificate (these are also the summer tyres!), but 225/50R17 are mounted on the rims! So what to do? VG Birger