Resistors are non-polarised electronic components. So when inserting them in a circuit, you can insert them in any way you want, as long as both ends are connected to the circuit.

Can you identify all these resistors?

From left to right, top to bottom: 330Ω, 1kΩ, 1MΩ, 2.2kΩ, 330kΩ, 10Ω, 4.7Ω, 4.7kΩ, 1Ω