Cool that may be the route I go, unless you guys have any better ideas/suggestions. I really appreciate the help guys, electrical is not my thing.

 

The situation I alluded to was having a good start battery, and a drained aux battery.
When you start, the solenoids cut in and join the two batteries together.
The large difference in charge state between the two causes a large (high amp) current rush between them as they try to equalize their charge state.
This will test your wiring (think jumper cables).
And the rapid charge/discharge will dramatically shorten the life of your batteries.

A diode isolator keeps both batteries independent of each other at all times, and sends power from the alternator to charge both.

 

Sounds like doide isolators the direction I should head in then. Thanks for dumbing it down for me and making it understandable

 

I used the solinoid relay you linked to, which works great. That being said my batteries are connected with 4/0 cable, with the intention of being able to jump start myself on cold days / after weeks of not using the truck.

 

With a conventional jump start, you only connect the two batteries together long enough to execute the start... then you disconnect the good battery and the low battery is charged back up in a controlled manner by the alternator.