If the cables are that tiny, something like this should work https://www.amazon.com/Circuit-Negative-Waterproof-Indicator-Automotive/dp/B09PRNZ2JL/ref=mp_s_a_1_19?crid=8V3R97GV7JXV&keywords=car+audio+blade+fuse+block&sprefix=car+audio+blade+fuse+block%2Caps%2C221&sr=8-19