2 Clean Octane Decals Black-White + BakkesMod Preset
2 Clean Octane Designs Black and White made by ReZLone
There are 2 variants you can use one for all the teams or use it separatly for each team (es. Team Blue: White, Team Orange: Black)
Also there is one with my nick (ReZLone) wrote on it and it's the one used on the last screenshots. I've put it in there just for inspiration and you can change the name by using any photo editor of your choice as shown on the tutorial.
The Black design needs to have a TW Octane to properly work. If you do not have one you can use bakkesmod either with my preset (code: wwdICFyAgBAMmfEDMm7tZAAELkBGCIbM+AEZt3YOAA==) or manually setting the tw color to the octane.