Noob question... Support Component, Why I can only connect 1 point..?

Why my Support component in input Pos|Ind can only receive one Pt only ?
The example for Single Span Beam has two. I try to reconstruct the example and the specific component only allows for one point… Any ideas ?

Thank you.

Found it…Press Shift…
Tnx !

You may want to check some intro to grasshopper tutorials before jumping into plugins.