Add additional information to data cursors

Hello, I would like to add additional information to my data cursors on a plot I have. My code currently looks like this:

fig = figure('name','Flight Profile');
plot(TrkDistAbsInstr, interpolated.MSMC.Profiles(:), 'o')
xlabel('Track Distance [Nm]');
ylabel('Flight Level');
title('Flight Profile');
grid on
dcm = datacursormode(fig);
set(dcm, 'UpdateFcn', @ATCInstructionsDataCursorFunction, 'SnapToDataVertex', 'on');
datacursormode on % sets the mouse to default to a data cursor

Where the code for ATCInstructionsDataCursorFunction is:

function [output_txt] = ATCInstructionsDataCursorFunction(~,event_obj)

pos = get(event_obj, 'Position');
idx3 = get(event_obj, 'DataIndex');

    output_txt = {['Track Distance [Nm]: ',num2str(pos(1))],...
        ['Flight Level: ',num2str(pos(2))],...
        ['Instruction Index: ',num2str(idx3)]};

    end

This gives me a dataplot with the Track Distance, Flight Level and Index on the datacursor. I would like to add additional information to the datacursor, that I have stored in another structure, EFPS_Combined.action

How can I get say,

EFPS_Combined.action(x) % where x = 1:17

To display the value of EFPS_Combined.action(x) on the xth datapoint?