You are correct, #2 on A-bank/first picture is thermotime. This controls the cold start injectors. Note: these are an unimportant component of the D-Jetronic system and the car should function just fine without them.
On B-bank, I think the item labelled “L.S.” is a vacuum valve which controls the air pump and exhaust gas recirculation system. I suspect that if you poke around beneath the cloth wrapping, you may find two small vacuum lines rather than electrical connections. I could be wrong though: a clearer photo of the connections would clarify things.
FWIW, all D-Jetronic connectors on the car are identical. The ones on the temperature sensors in your photos are the same as the ones on the injectors themselves. Therefore, if your mystery item has D-Jetronic electrical connectors, that’s a pretty good indication it’s EFI related.
Conversely, if it has spade terminals or vacuum hoses, that will be a pretty good indicator that it’s a non-EFI sensor (can’t think what that would be) or vacuum (emissions control system, or to attach to fuel pressure regulators to prevent vapour lock at hot start-up)
In terms of the testing values, try this site: D-Jetronic chapter 13: Troubleshooting and repair
1979 XJ 5.3 (pre-HE)