What are these wires for? Under dash radio harness

[josephmichael09]

I purchased this vehicle from some people who really didn't know what they were doing. The radio was pulled out and i found that they cut the original harness. I could have put the original harness back but didn't feel like ordering the original part or going to the junk yard to pull one out. So, i decided to just solder the new wire harness from the new radio directly to the harness. I cannot figure out what these 3 wires are for.

any ideas? I don't know if i should leave the disconnected or connect them to something.