The Muladhar chakrais the 1st swayambhuling, the unawakened Kundalini is coiled around it, 31/2 times, with her tail in her mouth,indicating the flowof the energy is downwords. She is connected with the path of Sushumna.
The 2nd Shivling is in Anahat chakra, known as Banalinga.Deity of this chakra is Isnana Shiv.
In Vishuddhi chakra, Panchvaktra Shiv is the deity, his 5 faces are, Aghora, Ishana, Mahadev, SadaShiv, Rudra. He is Karpur gauram, his 5 heads representing smell, taste, sight, touch & sound, the 5 elements. He represents the union of all 5 elements in it's purest form. Here all the elements dissolve in one union.
The 3rd Shivling is in the Agya chakra, Deity is Ardhanarishawr, they stand in a ling known as Itar ling, also known as Jyotirlinga.
In Soma chakra, a minor chakra of Sahastrar chakra, Kameshwar & Kameshwari resides in an eaternal union. the awakened Kundalini as Kameshwari is in peace here.
Lalita sahastranaam, mentions, her names as, Muladharekanilaya brhmaganthi vibhedini,
Manipurantrudita Vishnugranthi vibhedini,
Aagya chakrantralasha Rudra granthi vibhedini,
Sahastrarambujarudha Shdhasarabhi varshini,
tadillata samaruchih Shatchakropari sansthita.
also as,
Kameshwar pran nadi krutanga kampujita,
Shrungar ras sampurna jaya Jalandharsthita,
Odyanpith nilaya bindumandalvasini,
Different part of Shri-Chakra are visualied in our body. Since Lalita Tripursundari is the Goddess, knowing more about Shri-Chakra may solve further doubts.