[sam's 72]

I am putting on a internal regulated alternator. This is what I have done, I jumped over the plug that goes to the old regulator, ( like the picture shows ) then I ran a new wire from the new connector ( white wire ) to the brown wire, then ran a new wire from the back of new alternator to j block, hooked the red wire from new connector to back of alternator, ( thats two wire hooked to back of new alternator ) the red one from connector comming out of alternator, then new one running to j block. then from j block to battiery. my question is this, I want to get rid of my old wireing horness, it has a red wire, a blue wire and a white wire, what do you do with these wires if you want to cut them loose? Also, the way I have it wired now, when I start up my truck, the amp gauge goes all the way over to the left. Whats up with this?
Sam