i have a old orion 260 2 channel amp
i need to know how to bridge it?
left + right - or the other way around?

 

one way you will have sound the other way you will have nothing

 

What model of 260 ? The really old stuff needed a bridging module to be able to bridge it.

 

i not sure on the model im at work now, i can tell you its blue and has no crossovers built into it

 

Probably a cobalt!

 

I know I just woke up but the only 260 in the Orion lienup that I recall is from the Cobalt line (first series).
If that's the case then for bridging it's:
Right = positive
Left = negative

or if you need a second opinion:
http://www.orioncaraudio.com/alley/pdfs/cobalt1sers.pdf