I'm installing a electric winch on my trailer that requires 8ga wire from the truck battery. Can I make a extension to continue this wire back to the batteries to keep the refer running while on the road? Fused at 50A. Ya, I know - disconnect it when stopped. Some of the trailer places have some whiz bang built in a little sealed black box that I question the need for - 30 yrs ago I was all for "whiz bangs" ! :lol: