連接 or 連結 for people connecting sector
連結 and 連接 are basically the same when it comes to the meaning of 'connect/ link'.
The only difference is 結 is specifically refer to as 'bonded connection' while the connection in 接 can be a firm bond or an unbonded contact.
Also, 連結 can be a noun or a verb, but 連接 is used as a verb only

連 - link; connect


結 - to tie; to bond


連結 = link (n); to link; to connect (v)

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連 - link; connect


接 - connect; touch


連接 = too connect; to link

Example:
連接兩條電綫 can mean put two wires together to complete an electrical circuit or bond two electric wires together, while 連結兩條電綫 can only mean the two wires are bonded