Dick, mine does not have blind nuts either and page 9 shows putting the tail with 3x10 screws but says nothing about blind nuts. There is no real way to access that area to add them either as it is blocked off from the servo opening.
Have you actually installed yours with blind nuts?
ORIGINAL: pettit
There are blind nuts in the tail to hold the horizontal stab halves in place.
Four on each side, 2 on top, 2 on bottom, they take 3x10mm machine screws.
It's shown on page 9 of the manual.
Then you glue the stabs in place, but I'd bet you could forget the epoxy and just bolt them on.