I don't know about the couplers, but don't think the 227 or 228 tenders should have hooks on the spears. Or the tenders shouldn't have spears at all.
I do know about the wiring. . .
I opened up a 2227B tender and shot a picture of the insides.
That tender works, but I think it should have just a spear on the coupler, no point.
What you see from front or left is the relay used differently for different locos and not found on 2230 and 2231 tender, the center part is the bell, and the rear part has the light. On tenders with bells the light has a bimetalic strip that energizes the bell. I think all the tender numbers can be found with or without bell, but never did a survey.
The relay body is insulated from the tender chasis and connected directly to the roller pickup on the truck.
Ignoring the bells and backup lights which are always wired the same and don't effect the plugs, here's the tender wiring:
2227 and 2228 relay runs couplers. Picture above. Two wires to loco, one on left goes to loco coupler, right goes to center rail pickup from relay body. Right and left looking at loco from on top of tender coalpile.
2230 and 2231 NO relay. Two wires to loco. Wire on left goes directly from coupler shoe on tender truck to plug; wire on right goes to center rail.
2232 and 2233 Wire on left goes directly from coupler shoe on tender truck to plug in socket in loco for coupler. Relay body is connected through right plug to center pickup of loco. 3rd wire comes off relay terminal and is connected to positive side of e-unit coil in loco.
Does that make sense?
Before I go on, I moved a bag with a bunch of those relays from one place to another in the last month or so. It's not currently in either of the places I think it should be in, but it's certainly around here somewhere.
Here's a related question. . . I have a newer transformer with bell and whistle buttons. On the 2227B tender shown above ONLY the bell button works the coupler. I was thinking I could use a whistle relay working on the whistle button and power the rails of the RCS tracks.
I'm going to try just adding a diode to the coil of the relay. Because the diode is directional, it should line up with the bell or whistle button. Does that make sense?