This device is an LT-933 Terminal Block Dual Head Quick Push-in Splice Connection for LED Lamp with 3 inputs /9 outputs.
This is a PCT-218 terminal Block Wire Connector 8 positions 32A, 250V.
This device is an LT-633 Terminal Block Dual Head Quick Push-in Splice Connection for LED Lamp with 3 inputs /6 outputs.
The TB-SP-T11 is a T-shape 3 position tap splice connector with mounting bracket.