Change workitem text using PFTC in ECC for Task TS20000172 – release contract

Hello,

I would like step by step guidance on changing the worklist item description for Task ID TS20000172. Currently the contract goes for approval and the worklist item reads “Release  of Contract 4600000000”. How can I add the value of the contract in the worklist text? I looked in transaction PFTC, Container tab but could not find the variable ‘Value?’. Please advise?

Thanks, Naz