National Super Alliance (NASA) leaders on Tuesday paid a courtesy call to Wiper Leader Kalonzo Musyoka in Germany.
Mr Musyoka took to social media to thank the leaders: "Thank you, my brothers, Sen. Moses Wetangula, Governor Prof. Kivutha Kibwana and Governor Josphat Nanok for checking on me in Germany."
The Wiper Party Leader is set to return to the country on Friday in the company of Opposition Leader Raila Odinga.
Earlier reports indicated that Mr Odinga, who traveled to Europe on Monday, would pass through Germany to meet his running mate.
After the meeting, the two leaders are expected to travel back home on Thursday night and arrive in Nairobi Friday morning.
Kalonzo has been missing from the political scene after he traveled to Germany last month.
Reports indicate that he accompanied his ailing wife for treatment.
Meanwhile, National Super Alliance (NASA) leaders have planned a grand reception for their two principals when they jet back to the country.
On Thursday, the Opposition team is set to conduct a rehearsal rally at Kamukunji grounds in preparation for the grand event scheduled for Friday.