I am currently working on a level 1-5 model in ARIS designer 

I have drawn the L1, L2 in VACD 

Planning to draw L3, L4, L5 in BPMN as I need swimlanes


The question is how do I link a process at L3 ( say 3.1.1) to (say 4.2.3) ? 

Where I would have drawn 2 different BPMN diagrams for 3.1.1 in 3.1s L2 and 4.2.3 in 4.2s L2, not sure which symbol to use, help me out folks