diff --git a/bitsandbytes/backends/__init__.py b/bitsandbytes/backends/__init__.py
index 669c0f536..743693d8d 100644
--- a/bitsandbytes/backends/__init__.py
+++ b/bitsandbytes/backends/__init__.py
@@ -3,3 +3,9 @@
 from .nvidia import CudaBackend
 
 _backend = CudaBackend(lib)
+# TODO: this should actually be done in `cextension.py` and potentially with .get_instance()
+#       for now this is just a simplifying assumption
+#
+# Notes from Tim:
+#       backend = CUDABackend.get_instance()
+#    	 -> CUDASetup -> lib -> backend.clib = lib