As for how to wire them,
The only thing that the photo tells about those switches is that they have four terminals/pins. That does not tell me/us what the switching configuration may be or even if all of the pins are actually used. With four pins there are several switching configurations that are possible:
SPST (Single Pole - Single Throw)
SPDT (Single Pole - Double Throw)
SP3T (Single Pole - 3 Throw)(not likely but possible)
DPST (Double Pole - Single Throw)
In some of these the pins may be doubled up with internal shorts. Also in some of them one or more pins may have no connection. This may have been done to have the pins there for a better mechanical mount.
You can easily determine the switching arrangement inside the switches with a multimeter, using the resistance scale or the continuity setting. I believe you marked the pins as A, B, C, and D. Start with the meter connected to pins A and B and note the reading. Call this by the switch position as "Switch 1". It should be either close to 0 Ohms (closed circuit) or infinity (open circuit). Now, with the meter probes still connected, change the button to the opposite setting and again note the reading. Call this by the switch position as "Switch 2". Keep track of the current switch position. These readings tell you something about pins A and B.
Switch 1 = 0 Ohms
Switch 2 = infinite Ohms
A and B are switched with Switch 1 being the ON state.
Switch 1 = infinite Ohms
Switch 2 = 0 Ohms
A and B are switched with Switch 2 being the ON state.
Switch 1 = 0 Ohms
Switch 2 = 0 Ohms
A and B are NOT switched and they are connected internally.
Switch 1 = infinite Ohms
Switch 2 = infinite Ohms
A and B are NOT switched. By itself this does not tell you if those pins are in use or not.
That test tells you a bit about the switch. Now you must repeat it for the other five combinations of the terminals:
AC
AD
BC
BD
and CD.
Once you have the above information on all of those pairs of terminals, you can determine the internal configuration with a bit of logic. If you have difficulty interpreting the results of these tests please post the readings and I/we will help.