I've most often seen the word "load" associated with the L terminal. If your schematic doesn't use the L terminal just ignore it.
A wild guess for using the L terminal rather than tying all loads to the battery is the L may be regulated to about 12 volts, while the battery charges up over 14 volts. But I pulled that one from you-know-where.
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Rusty 149 project with:
QA42 snow thrower
38" deck
Barn fresh 1811 with:
44c mowing deck
QA42A snow thrower
42" snow blade
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