questions about a inline 6 250

[RAS C-10]

Of you guys who have knowledge in regards to Inline 6 engines especially the 250. first off I know the object circled to the left is barely noticeable' I know there is some type of sensor there just don't know what i should be.(PO broke it off and sealed it with gasket sealer) I'm guessing that it used to be the temp sending unit due to it being so close to the thermostat.

As for the second circled sensor I have no clue.

The other two pics im interested in know if anyone recognizes the bracket sitting where the power steering bracket is. My question is looking at the upper bracket and the lower bracket that has the alternator connected to it, am I just missing the piece that is from what I can tell called the "Cradle" part that holds the PS pump?