If you find yourself using any type of crimp on connector i.e: spade, eyelet, bullet connectors, instead of using the bulky insulated connectors opt for the non-insulated ones and use shrink tube to cover the exposed crimp. This will not only look better but also hide the crimp and still offer the same amount of protection as the insulated ones (assuming that it’s not an area with high heat or vibrations).

Another added bonus is that you can use the shrink tube to signify if the wire is a hot or ground since some manufacturers don’t follow the honor code of red = hot black = ground.