marklin H0-Oberleitung User Manual page 29

Step 4:
Mark the position of the new mast base and screw down the mast base
at this location.
Step 5:
Slide the standard mast on the rear mast base. Install the rear catenary wire.
The last mast base that has been installed is not yet completed with the
standard mast, since this mast base is required for the next catenary wire
as the starting point for the positioning jig.
From here you proceed as in Step 1.
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