the black wire daisy chains to a bunch of places, so most spots it attaches to has two wire segments.
coils with two lugs don't care which way the wires are connected in AC circuits - assuming the wiring isn't mixed up. i.e. wires that are supposed to attach together on a lug aren't split and attached to both lugs. Usually a fuse will let you know if that happens.
probably the easiest thing is use a jumper wire. Attach one end on the RED-GR wire on the 15A 25V fuse and touch other end to both sides of the E relay switch in the circuit you highlighted in your second pic (close the E relay when you're on the YEL+BLK wire). If the red kicker coil doesn't fire, touch jumper directly to the coil lug that ISN'T the black wire(s) to test the coil.
if the coil is good but jumping to the GR-RED wire on the E relay didn't power it, the only thing left is the wiring/plug connections.