(Reuters) - Australia"s Link Administration Holdings Ltd LNK.AX agreed on Wednesday to open its books to Carlyle Group Inc CG.O and Pacific Equity Partners after they raised their offer for the shareholder registry firm this week. However, the shareholder registry firm said it did not see “compelling value” in the sweetened A$2.87 billion ($2.05 billion) takeover offer. The promise of due diligence information comes on the deadline date set by the consortium, failing which it had threatened to walk away from the deal. Link said it was providing the information in the hope that it would lead to a proposal it could recommend to shareholders. The private equity duo had bumped up its offer by nearly 4% after Link rejected a previous offer last week.