[Al Skierkiewicz]

Alex,
The Power Pole connector line is very reliable and has connectors available up to 200 amp. We used the 100 amp for many years before the 50 amp red polarized, became the law of the land. You can obtain the contacts and bodies from McMaster Carr or any other Anderson dealer. Normal Power Pole connectors can be polarized by rotating one of the connector bodies to be 90 degrees away from the adjacent one when you assemble the two. Of course, you do need to make every one the same since they are not inherently marked as positive or negative.