What track does this bias current loop through?

Question

Please see the edit.

A source is coupled to a diff-amplifier circuit as sown below:

The 10k R1 provides a path for base currents to return.

But Im confused about the loop taken by ib2.

For ib1 I can say it loops through A-->B-->C(GND)-->D-->E--F

Is this loop for ib1 correct?

Im confused about ib2's track

Does ib2 loop through F-->G-->C(GND)-->D-->E-->F

But this doesn't make sense because current cannot loop back to the same terminal.

I put those capital letters for nodes as A, B, C ect.

What is the correct track for ib2?

EDIT:

Let me ask this way:

^{simulate this circuit – Schematic created using CircuitLab}

In the above conceptual schematics Rb providing return path.

What are the loops for the input bias currents in terms of nodes for ib1 and ib2? I named all nodes with capital letters. An answer would be like A-->B--> ect. easy to demonstrate.

Answer 1

Regarding second diagram:

path of ib2: BAT2(+)-> D -> Rb -> X/K -> B -> C -> BAT2(-);

path of ib1: BAT2(+)-> D -> Rb -> X -> A -> B -> C -> BAT2(-);