Approval process for custom BO

Hello experts,

I'm trying to add approval process for custom BO. Generally, everything works fine, approvals are sent to approver and the frameworks works well. However, I have no Idea how add EC component to my BO's TI screen to visualize BO's approval step to the enduser. For example, Opportunity_TI uses SRM_MultiStepApprovalReuse_EC component to visualize approval steps.

Has anybody any idea how to add approval step visualization to the TI? There is no info in guides about it :(

Regards,

Alexey