If the used solar panels you were looking at buying had mc3 connections, how would YOU make extensions to get to the junction box;
A: crimp the correct mc3 ends on the new wire
B: buy mc3 to mc4 adapters then crimp mc4 on new wire
C: cut the mc3 ends off and crimp.mc4 ends on panel and new wire
A: crimp the correct mc3 ends on the new wire
B: buy mc3 to mc4 adapters then crimp mc4 on new wire
C: cut the mc3 ends off and crimp.mc4 ends on panel and new wire