The sprocket box fixing nut ( right side of the trainer ) can be compatible with the "thru axle" ( has a 12 mm hole) , or with the "quick-release" ( has a 5 mm hole ).
In the case of the adapter for "thru axle", it is necessary to use a 17' wrench = 17' wrench
In the case of the "quick-release" adapter, it can be removed in two ways, depending on the type of the adaptor.
Allen key of 5 left - 15' wrench right
If the fixing nut has a groove on the edge, it can be removed with a 17' wrench = 17' wrench
If instead the whole circumference is round and has a central hexagonal groove ( where the quick-release comes thru ) it is necessary to use an Allen key of 5 = Allen key of 5