Heath Consultants Optical Methane Detector (OM) - Manual (Page 13)

13
Cable assemblies installation:
Each cable assembly for the OMD is uniquely constructed so
that it cannot be connected to the wrong mating connector.
First, you will need to determine which cable goes where. If
you mounted the power box under the hood, then you will only
need to route the display cable either through the firewall or
through the floorboard. If you mounted the power box inside
the cab, you will need to route the other three cables into the
cab as well.
I
NSTALLATION
Unless a hole large enough to route the cabling through already
exists, you will need to drill one. A hole approximately 1-1/8
inches in diameter should be sufficient to route one or three
cables. A 1-1/8 inch rubber grommet should be used in this
hole to protect the cables from damage. A 1-1/8 inch rubber
grommet may be purchased from Heath as P/N 2510686.