I agree, no switch. I invested in a good battery jump pack as added insurance. the jump pack has been absolutely fantastic when helping other boaters at the dock or stranded out on the lake.
the more simpler and direct you make your electrical connections.....the better off you are. remember, every time you make/add a electrical connection, no matter how good it is......you are adding a small amount of resistance. with no switch installed, that is just one less part that can fail. there are lots of posts in this forum of selector switch failures and connectivity problems.