Battery cable through firewall options

[DT69Cam]

I've used the heavy duty rubber grommets successfully. I can't remember the brand but I'll attach some links. I've used them through frames and firewalls with no problems and they've stood up well. I'll look for a brand and part number tomorrow.

https://www.lectriclimited.com/media...und_straps.jpg

http://www.steelerubber.com/battery-...met-40-0322-21

The battery grommet is another option. However, I'm using 1/0 Batt cable. Actually, I think the 1/0 gauge cable is 5/8's. I will have to double check. Thx.