Porsche 911 rear light housing. Fits on a standaard G-model. Original modelling credits go to https://www.printables.com/@decretk_338083
The model is designed around bulb holders from https://www.classiccarleds.co.uk/ (no affiliation). In particular these items:
There is a rear cover that hides the electronics. You can use a Deutsch HD10-5 connector for the connection to the original harness. Use a sealant to create a weather tight seal between the housing and the cover.
The author remixed this model.