All fixed, btw.
And yeah the tab on the spade connector (blue/14 gauge/#30) didn't engage which is why this whole mess happened. I spent like half an hour picking at the spades this time (one was a real bitch) to make sure those tabs were sticking out. Got them all locked in and realized there was no way to bolt the new relays on my nifty little homemade "relay bar" (shown above). The new holders had little nibs but the studs on my holder were too long to use. They would interfere with the relay bodies.
The relays themselves had slots in back for metal clips (like the one between those two and the seat heater fuses), but I couldn't find my bag-o'-metal-clips-for-relays I bought like a year ago...
Finally found it and—joy!—discovered these newfangled fused relays used some newfangled kind of metal-clips-for-relays, which I did not possess.
So, rather than just stuffing the mess up under the fender and maybe zip-tying it to a loom cover, and rather than buying yet another bag of metal-clips-for-relays, I drilled holes in two of my existing metal-clips-for-relays and then riveted those to the relay carriers and then affixed the carriers to the "relay bar," neat-like.
Some day this build is gonna end...