Sticking closely to the rules:
 - The purpose clause always precedes the noun or verb whose purpose it is describing.
 - qatlh "occurs at the beginning of the sentence."

Except we know that sometimes when Okrand says sentence he means the verbal clause under consideration. You would not, for instance, translate I ask why I was chosen as qatlh jIjatlh vIwIvlu'pu'? A sentence-as-object is still a sentence, but you'd put the qatlh with the piece it belongs with: jIjatlh qatlh vIwIvlu'pu'; qatlh vIwIvlu'pu' jIjatlh.

It's a very murky area of Klingon grammar.

-- 
SuStel
http://trimboli.name