There are different combinations possible in that case. Normaly fastest drive is best for the “main” pagefile. Splitting it can be helpfull in case main-drive have limited amout of free space, then you can also configure a pagefile on another drive ( all together is for windows like “one block file” ).
If you split the pagefile then I would recommend to let allways a “fallback” size ( e.g. 4gig ) on main drive in case you someday disconnect the other drive. But for the test-case it is in first step not so important.