Need help fitting aftermarket stereo

[L33.H]

I need someone to help me, I would appreciate it so much, I have a lexus IS200 se year 2000, I have bought a jvc stereo which came with a wiring harnes, I then ordered a fascia that comes with a harness that would go into the harness that came with the stereo, but it doesn't fit it the the plug that was in the standard radio, i don't really want to bypass the amp either, is there anything I can do here ? 

[TigerFish]

 

I didn't think bypassing the amp was optional, you'd have to, to avoid blowing it up with a high power feed. Unless it is a base "S" model that doesn't have the amp.

 

 

 

Sent from my Iphone using Lexus OC

 

[L33.H]

It does have an amp in the left hand corner behind the glove box, iv found out now that i take one or maybe two of the plugs out of the back of the amp and plug the bypass wire in to the plug I have taken out of the amp, the other side of the bypass wire plugs in the the stereo, does this sound right?