How to install an amp to a factory stereo?

I have an 05 accord coupe and was wondering how to connect my rca cables without taking out the factory head unit? Is it possible to connect to my rear speakers with a converter? Also my amp doesn't have a remote wire prong instead it has a jack like for a small harness how do I connect my remote wire?How to install an amp to a factory stereo?
Okay I have same car .... you will need a hi to low converter ... it takes signal from speaker wire and converts it to rca... its simple to install and costs around 15to 30... they even have em at walmart... your remote cable will have to be ran to your fuse box which is on the right side drivers ... by the left foot drivers side .... you will choose a fuse that shuts off when the car does .... I chose the car stereo one that is on the same car on the top right... wrap the wire around fuse and stick it back in the same spot ... its not so complicated

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