How morality and spirituality are connected?

Spirituality is a broad concept with room for many perspectives. In general, it includes a sense of connection to something bigger than ourselves, and it typically involves a search for meaning in life. It refers to certain kinds of activity through which a person seeks meaning, especially a "search for the sacred". It may also refer to personal growth, blissful experience or an encounter with one's own "inner dimension."

In Abrahamic religions(Christianity, Islam, Jewish) for a person to be spiritual he/she has to adhere with the 10 commandments.

"As of 2010, Christianity was by far the world's largest religion, with an estimated 2.2 billion adherents, nearly a third (31 percent) of all 6.9 billion people on Earth," the Pew report says. "Islam was second, with 1.6 billion adherents, or 23 percent of the global population." The world's core Jewish population in early 2014 was estimated at 14.2 million people (around 0.2% of the world's population).

The Ten Commandments

1. I am the Lord, your God.
2. Thou shall bring no false idols before me.
3. Do not take the name of the Lord in vain.
4. Remember the Sabbath and keep it holy.
5. Honor thy father and thy mother.
6. Thou shall not kill/murder†.
7. Thou shall not commit adultery.
8. Thou shall not steal††.
9. Thou shall not bear false witness against your neighbor.
10. Thou shall not covet‡ your neighbor's wife (or anything that belongs to your neighbor).

Of these 6 are about an individual’s morality. These are rules which all people accept as moral codes, irrespective of their religion (including atheists). Hence it is not possible to separate morality and spirituality completely. For a person’s spiritual upliftment he needs to have strong moral codes.