Terminal Block Diagram/Labels ?

The block only as ground and positive feeds through it. The 16 gauge loops run to the accessories in bilge area, the 12 gauge wires go to either dash or master switch in that area, and come from the battery.

Looking at this block, the main ground feed is the big wire coming from the battery. The loops on the bottom are just daisy chaining the grounds to each terminal. The black wires on top are carrying the grounds to different appliances. Im guessing there is no “order” on which these grounds are put on this block since it is a junction block. On the positive side, the big orange wire and on the bottom is the positive feed from the battery. The red wire on the bottom is daisy chained from that wire to the next terminal. The big orange wire on the top is probably feeding the accessory switch or the dash panel while the red wire on top is probably feeding whichever the orange isnt. Again, Im guessing they are in not particular order since there is only two feeds to the front. Hope this helps.John

There are other options but the one they use works fine if it is kept clean. I coat the bar with dielectric grease after cleaning and havent had any corrosion issues. Having wires pull out or break at the connectors, yes. Gotta check it periodically.