Speaker placement for Definitive Bi-Pole Tower 30s

Hi: just got the DEf-TECH bp 30s for home theater, it is a big room but rectanguar any ideas on what to think about for speaker placement for bi-poles to adjust sweet spot, right now they are next to big screen about 22 inches from back wall and angled in to prime listening area but since they are true bi-poles not sure what is the best. Also: in terms of bi-wiring, it has factory issued jumpers but want to bi-wire folllow english school?
thanks
Arturix