Getting ready for ultrex 24 volt. Replaced original ,8 ga wire (12 volt) with 6 ga from battery to plug at bow (22 ft). There is a 8 ga lead/pigtail about 1 foot long connecting main wire to TM plug. I have connectors that will connect 6ga to 8 ga. Question is, do I need to replace that lead and plug to accommodate 24 volt or can I use this lead and old plug?