Reply to Advice needed for setting up my passive speakers!

Hi,
Have recently bought some Alesis Monitor one mk2 passive speakers ( http://tinyurl.com/pkzbfx7 ) and an Alesis RA-100 amp to match !

Now I want to be able to use these with my decks/mixer and pc for my daw output. Was hoping someone would be able to tell me since the back of the amp looks like this ( http://tinyurl.com/qa8flrl ) if these cables would be right.

I believe (may be wrong) that these cables will go from the 1/4 phono to rca for my mixer - http://tinyurl.com/pcnv4dk and are unbalanced. Then this cable to turn the rca to a 3.5 jack for the computer http://tinyurl.com/nfbug5s

Just hoped someone with a better knowledge will know if this is right before I order the cables as id rather get it up and running asap instead of running around trying to get different cables.

Thanks