Ferrules for Multiplus 2 with SOOW 6/4?

Hey all new here and I just got a MP2. I’m installing it in a 2006 Bounder 35e. The transfer switch is in the back drivers side and the batteries are in the front pass corner. I was told it’s better to run longer 110 than 12v so I’m going to try and find a place to mount in the middle as I’m installing a new 480ah Lifepo4 too. My question is how long can I go on the runs? Also I was told SOOW 6/4 is the best for the 110 side. I will be running a new line from my transfer switch to the MP and then a line from the MP to a junction box where it will meet the current line that was going from the panel to the transfer switch. I’m getting such mixed reviews on whether to use ferrules or not. If anyone can offer and advice I would greatly appreciate it!