Addition of Multiple default currencies in Bidder Tab

Hello experts,

We have a requirement from our client to add multiple currencies in the Bidders Currency table while creating the RFx.

In our current scenario, only 1 currency INR is loaded by default as shown below.

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Now we have a requirement to by default add more currency with out user interaction i.e. when the view is loaded as shown below.

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We tried loading the valued by writing over-write exit to the init() method, but didn't achieved the desired result.

Any suggestions to achieve this would be appreciated.

Thanks in advance.

Regards