The opening of Al-Baqarah first mentions the God-conscious, then describes their qualities, and finally uses «أُولٰئِكَ» when ascribing guidance and success to them. The progression has three connected phases.
StageExpressionRhetorical role
1لِلْمُتَّقِينَIntroduce the intended group
2الَّذِينَ يُؤْمِنُونَ بِالْغَيْبِSpecify defining characteristics
3أُولٰئِكَ عَلَىٰ هُدًىAssert a judgment about that group
The stages jointly show that the predication is attached to the described people. This is an analysis of the text's arrangement, not an addition to the Qur'anic wording.