I am trying to set a field value of a multi-select field with Set Variable in Zoho flow

One of it's values is "Trialing"

I click on the value field then from the right hand side-panel I find the proper field and click this fills the value input box on the left with:

${createOrUpdateContact_1.sumApp_Status}

I want to set this to "Trialing"

I have tried different ways of doing this (as I can find no explanation in docs) 

${createOrUpdateContact_1.sumApp_Status}"Trialing"

${createOrUpdateContact_1.sumApp_Status}="Trialing"

${createOrUpdateContact_1.sumApp_Status"Trialing"}

${createOrUpdateContact_1.sumApp_Status="Trialing"}

etc.

None of which work

Hoping for help on how to do this

Thanks