Tonearm cartridge wires question

Thanks guys. I have the silver Valhalla tonearm wire on my Classic tonearm and there is quite a bit of "slack" in the wires between the pins and the opening in the tonearm tube where the wires come out. I'm not sure what sort of insulation Valhalla wire has as it just looks silver. I suppose they come together as they enter the tube anyway so there should be no detrimental effect, but I wondered whether I should try to keep them as far apart as possible. Sounds like I need not worry about this.

Two questions:

1) Given the proximity of the cartridge pins and tonearm wiring, don't most headshell wires come into contact normally on most setups?
2) As Raul pointed out, if the choice of the wire pin connectors matter, how do you change them? Doesn't it necessarily entail re-wiring of the tonearm?