I went from 7 on my MH to 6 on my Jeep. 6 pin is slightly smaller and was easier to mount on the toad. (I also have a Blue Ox base plate) I ran a charge line with diodes. I built my own cable. I ran the wires in clear flexable tubing. Building my own cable I could select the wire size of each wire. I mounted the diodes in a small box near the toad battery.
Building cables. You can buy cable pulling lubricant from electrical supply or hardware store. Use stranded automotive wire. The flexable tubing is also available from the hardware store.
