Looking for Haack Family of Ashburton Nz

Hi, hoping someone can help locate grave/cemetery record for JOHANN(JOHN)Haack in Ashburton. Johann was born in Zambost, Germany in 1869 and died in Ashburton Aug 1939. He married Mary Ann Begg in 1899 in Ashburton. Mary Begg died in Ashburton on 16 Dec 1960 and buried in Ashburton Cemetery. Records show
Area 239 Plot No. 20. Plot purchased by John Haack 17 Aug 1939.

From information supplied by family Johann's grave is next to Mary Ann's. Would also appreciate it if you are able to find these graves if you could also tell me if Mary Ann's grave shows her parents name.

Many thanks

Ellen