DC-3 Controls Help

I’m trying to setup several external switches to operate the energize, mesh and prime switches. I have a BU0836A with a custom panel I created. I have it working for multiple aircraft in FSX.

I’m trying to set it up for MSFS. I can setup the C172 and many of the functions in the DC-3, but I can’t figure out the startup.

Anyone done this or know which controls I should select?

Thanks.

I use SpadNext : and assign these to buttons
LVAR:DUCKWORKS_SWITCH_PRIMER_1 (0 and 1)
LVAR:SWITCH_STARTER (0 - 1 - 2) =(up - middle - down)
LVAR:MESH_STARTER (0-1-2) = (up -middle - down)

Thanks for the response. I’ll try that soon.