"For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them."
Both passages touch on the idea of God having a purpose for individuals. Ephesians 2:10 states that we are created for good works which God has ordained, while EGW states that God could fulfill His purpose through them.
"The same mighty truths that were revealed through these men, God desires to reveal through the youth and children today. The life of Daniel and his fellows is a demonstration of what He will do for those who yield themselves to Him and with the whole heart seek to accomplish His purpose. PK 490.2"
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven."
Both passages highlight the idea of individuals demonstrating God's power or glory through their actions. Daniel's life, as described by EGW, serves as an example of letting one's light shine, similar to the message in Matthew 5:16.
"With my whole heart have I sought thee: O let me not wander from thy commandments."
Both passages emphasize seeking God with one's whole heart. The EGW passage speaks of yielding to God and seeking to accomplish His purpose, while Psalm 119:10 expresses a desire to not wander from God's commandments. The connection is valid and meaningful.