Connecting hardware to add on aircraft that don't use fsuipc or fs common offsets?

Hi Everybody. I am currently working on building an AV8B harrier simpit based on the Skunkworks AV8B. however i have run into an issue namely that i have no way of interacting with lights and av8b specific buttons etc.I use mobiflight and fsuipc but neither have offsets from the cockpit items.For instance the master caution and master warning panel have annunciators associated with the various critical systems, how do i trigger an associated hardware led light to come on without knowing the offsets ?i mainly use BU0836 and Arduino hardwareI have read something about extracting LVARS through fsuipc and generating a macro for mobiflight, however i think that is only for buttons, how about pots and leds?Any information or wisdom from your fine selves would be much appreciated!Thanks

Hi I used mouse macros to connect my real atr tq .Here is a wee link ,I connected each axis up to sliding pots inside the tq.https://youtu.be/g8_f5Ct--YkRegards Dave