I am planning to add an infinity basslink sub (200W rms) to my system which currently consists of a 4-channel alpine amp (55x4 rms) hooked up to 4 speakers. The amp's been wired to my battery with an 8-gauge wiring kit, but I'm not sure if that's going to be safe to power the basslink as well. So...

When I install the basslink, whats the best/safest idea for getting power to it?
- Should I get another 8-gauge kit and solder on to the amp's power cable?
- Should I rewire the car with 4-gauge power wire and use a distro block?
- Should I even be worrying at all??
I dont think the block/4ga is necessary since it's only a 60-amp load (420W rms)but I also don't want to have a fire, either. Any and all help is appreciated.