using values of an "expressioned" property as an input

The expression on layerB Position is an array of values which is picked by the numbers on another layers' markers.

(It might sound familiar because you took a big part in building this template I'm working on, solving all the riddles I couldn't decipher 😅).

This is the full expression both layers have on their position:

m = comp("ASA_LL_sky_UI").layer("Click controller B").marker.key(2).comment;


const cm = comp("ASA_LL_sky_UI").layer("Click controller B").marker;
const catM = comp("ASA_LL_sky_UI").layer("Sky CAT controller").marker;
let latestMarkerIndex = 0;


if (catM.numKeys > 0) {
 latestMarkerIndex = cm.nearestKey(time).index;


 if (cm.key(latestMarkerIndex).time > time) {
latestMarkerIndex--;
 }
}
let outputText = "";


if (latestMarkerIndex > 0) {
 const latestMarker = cm.key(latestMarkerIndex);
 outputText = latestMarker.comment;
};

menus =  comp("ASA_LL_sky_UI").layer("Sky CAT controller").effect(2)("Menu").value;
yVals = [371,634,896,1157,1416,1684,1950,2208,2470,2730,2995,3254,3515,3781,4038];
m = outputText-1;
y = yVals[menus-1];
result = [
	[ 159.0632 , y ],
	[ 349.0632 , y ],
	[ 540.0632 , y ],
	[ 731.0632 , y ],
	[ 920.0632 , y ]
];

result[m];