How to switch between 2 LEDs using a powered momentary DPDTswitch
Use any two different color LEDS reversed in parallel with a single R to limit current like 1k and connect across switch (to mechanical device).

Do you have +7 or -7V to load or +- V where V = 5 to 12?  Latter I guess.

LEDs will be selected with polarity and protect themselves from excess reverse voltage .