I crimped the lugs onto the battery and ground wires at the firewall while I still have easy access.
I am using Perihelion Design Fatwire CCA which takes a 1/0 AWG equivalent lug. I used TE Connectivity #321868 lugs (TERMINAL SOLIS RING 1/0 3/8) which have a 3/8″ ring for the studs in the firewall power bushings that I am using. I used a Temco TH1818 hydraulic crimp tool to crimp the lugs.
I ordered one extra lug and did a test on a wire sample first. I couldn’t budge the crimp with a pull test with all of my weight.
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230503_021750536789750493913471610.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230503_0235579645936487538485026474.jpg)
I then crimped the lugs on the battery and ground wires.
I didn’t want to drill a hole in the gusset that bridges the longeron to the firewall, so I chose to print a polycarbonate part to secure the wires instead. I also bonded zip tie mounts (with 3M DP-2216 adhesive) to the side skin to secure the wire in the space between the side channel and the gusset.
I used GripLockTies over some heat shrink to keep things from moving around with the vibrations up front.
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230508_1323108911474831540174364466.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230508_1322288674777042946567550474.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230508_132234848697575616285107665.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230508_1322471638113352050157586873.jpg)
![](https://airplane.allanglen.com/wp-content/uploads/2023/05/pxl_20230508_1322593593424692456509116158.jpg)
The end result is very solid and secure. I’ll add covers over the terminal studs in the final install.