B7200 Return to tank ?

[CalG]

I've recently come to own an early B7200 HST It is fitted with a hydraulic bloc that appears to be well suited to a multi spool selector valve with the power beyond returning to supply the 3ph lift.

Where is a useful return to tank? the fill cap is an obvious choice. Are there others?

 

[Floyder77]

This is mine. Like you said back to the fill cap.