I have two kicker 10s cvr and the wires came off

They are soldered on at the factory. There are times that the soldering job isn't done perfectly. If you do end up re-soldering them there may be an insulation covering the leads that will need to be burned off the lead. The insulation is the discoloration on the lead. When you do this, hold onto the lead with a weak pair of needle nose pliers to reduce a potential failure later.