Ok so i got myself a mazda trix rear camber kit like so
so i was talking to a buddy of mine and he told me that its not a good idea because it moves the driveshaft, so then i looked on the site and i found these

which i was told is the better one but i didn't know about this kit until now! i thought picture 1 was the only kit for it, because racing beat makes the same thing.
so i have three questions
1) is this kit save to use?
2) should i use?
3) how does one install it?
i didn't get any instrustions for it so i am not sure which ends go to which side. thanks for your help!