Are your drivers 2002's or 2002S's? The "S" version is the thread on type and the "non-S" is the bolt on type.Eminence does make an adapter that will convert the H290 horn flare to mate with thread mounted compression drivers. Selenium does too, but the bolt holes aren't right. I don't know why all these speaker driver manufacturers have such a hard time with this thing - but they do. They all seem to have their own funny little way of making what is otherwise a "standard bolt pattern" work with other parts.
Anyway, the H290 fits directly with the 2002 (non-S), so if that's what you've ordered, it will work very well.