Standard BAT, ACC, LPS, etc. circuits are hard wired in the fusebox. The male spade connector is just an add-on tap to get fused 12v+ of the specified function. Don't know about '67 but on my '68 they were only used by the factory for the clock option which had its own add-on wiring for the light (LPS) and 24/7 power (Bat). I assume there were other optional features that may have used them on other cars. I now also use them for power to my hidden audio lamp, power, and memory using female spade connectors. Conveniently, when the factory used the tap for the clock, they used a splitter on a short wire stub so a tap was still available.